diff --git a/bin/ma5 b/bin/ma5
index f7443f59..518c59da 100755
--- a/bin/ma5
+++ b/bin/ma5
@@ -33,7 +33,7 @@ This is the main executable, a simple frontend to set up the PYTHONPATH
 and call immediately the command line interface scripts
 """
 
-import importlib
+import importlib.util
 import os
 import sys
 
diff --git a/madanalysis/IOinterface/job_writer.py b/madanalysis/IOinterface/job_writer.py
index c5fae488..8350776a 100644
--- a/madanalysis/IOinterface/job_writer.py
+++ b/madanalysis/IOinterface/job_writer.py
@@ -705,6 +705,9 @@ def WriteSampleAnalyzerMakefile(self,option=""):
         # Options
         option.has_commons   = True
         options.has_process  = True
+        if self.main.archi_info.has_onnx:
+            options.has_onnx_inc = True
+            options.has_onnx_lib = True
         if self.main.archi_info.has_root:
             options.has_root_inc = True
             options.has_root_lib = True
@@ -740,6 +743,9 @@ def WriteMakefiles(self,option=""):
         # Options
         options.has_commons  = True
         options.has_process  = True
+        if self.main.archi_info.has_onnx:
+            options.has_onnx_inc = True
+            options.has_onnx_lib = True       
         if self.main.archi_info.has_root:
             options.has_root_inc = True
             options.has_root_lib = True
diff --git a/madanalysis/IOinterface/library_writer.py b/madanalysis/IOinterface/library_writer.py
index eb3ff3ef..5f3fd716 100644
--- a/madanalysis/IOinterface/library_writer.py
+++ b/madanalysis/IOinterface/library_writer.py
@@ -132,6 +132,8 @@ def WriteMakefileForInterfaces(self,package):
             filename = self.path+"/SampleAnalyzer/Test/Makefile_delphesMA5tune"
         elif package=='test_root':
             filename = self.path+"/SampleAnalyzer/Test/Makefile_root"
+        elif package=='test_onnx':
+            filename = self.path+"/SampleAnalyzer/Test/Makefile_onnx"
 
         # Header
         title=''
@@ -155,6 +157,8 @@ def WriteMakefileForInterfaces(self,package):
             title='*delphesMA5tune-interface* test'
         elif package=='test_root':
             title='*root-interface* test'
+        elif package=='test_onnx':
+            title='*onnx-interface* test'
         else:
             title='interface to '+package
 
@@ -190,6 +194,18 @@ def WriteMakefileForInterfaces(self,package):
           #  options.has_zlib_lib = True
             toRemove.extend(['compilation_zlib.log','linking_zlib.log','cleanup_zlib.log',\
                              'mrproper_zlib.log','../Bin/TestZlib.log'])
+        elif package=='onnx':
+            options.has_commons  = True
+            options.has_onnx_inc = True
+            options.has_onnx_lib = True
+            toRemove.extend(['compilation_onnx.log','linking_onnx.log','cleanup_onnx.log','mrproper_onnx.log'])
+        elif package=='test_onnx':
+            options.has_commons     = True
+            #options.has_onnx_ma5lib = True
+            options.has_onnx_inc = True
+            options.has_onnx_lib = True
+            toRemove.extend(['compilation_onnx.log','linking_onnx.log','cleanup_onnx.log',\
+                             'mrproper_onnx.log','../Bin/TestOnnx.log'])
         elif package=='delphes':
             options.has_commons     = True
             options.has_delphes_inc = True
@@ -260,6 +276,8 @@ def WriteMakefileForInterfaces(self,package):
             options.has_zlib_tag              = self.main.archi_info.has_zlib
             options.has_root_tag              = self.main.archi_info.has_root
             options.has_root_ma5lib           = self.main.archi_info.has_root
+            options.has_onnx_tag              = self.main.archi_info.has_onnx
+            options.has_onnx_ma5lib           = self.main.archi_info.has_onnx
             toRemove.extend(['compilation.log','linking.log','cleanup.log','mrproper.log'])
         elif package=='test_process':
             options.has_commons               = True
@@ -304,6 +322,9 @@ def WriteMakefileForInterfaces(self,package):
         elif package=='test_root':
             cppfiles = ['Root/*.cpp']
             hfiles   = ['Root/*.h']
+        elif package=='test_onnx':
+            cppfiles = ['Onnx/*.cpp']
+            hfiles   = ['Onnx/*.h']
         else:
             cppfiles = [package+'/*.cpp']
             hfiles   = [package+'/*.h']
@@ -333,6 +354,10 @@ def WriteMakefileForInterfaces(self,package):
             isLibrary=False
             ProductName='TestRoot'
             ProductPath='../Bin/'
+        elif package=='test_onnx':
+            isLibrary=False
+            ProductName='TestOnnx'
+            ProductPath='../Bin/'
         elif package=='test_delphes':
             isLibrary=False
             ProductName='TestDelphes'
@@ -364,7 +389,7 @@ def Compile(self,ncores,package,folder):
         if package in ['process','commons','test','configuration']:
             logfile = folder+'/compilation.log'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             logfile = folder+'/compilation_'+package[5:]+'.log'
         else:
             logfile = folder+'/compilation_'+package+'.log'
@@ -373,7 +398,7 @@ def Compile(self,ncores,package,folder):
         if package in ['process','commons','test','configuration']:
             makefile = 'Makefile'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             makefile = 'Makefile_'+package[5:]
         else:
             makefile = 'Makefile_'+package
@@ -401,7 +426,7 @@ def Link(self,package,folder):
         if package in ['process','commons','test','configuration']:
             logfile = folder+'/linking.log'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             logfile = folder+'/linking_'+package[5:]+'.log'
         else:
             logfile = folder+'/linking_'+package+'.log'
@@ -410,7 +435,7 @@ def Link(self,package,folder):
         if package in ['process','commons','test','configuration']:
             makefile = 'Makefile'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             makefile = 'Makefile_'+package[5:]
         else:
             makefile = 'Makefile_'+package
@@ -435,7 +460,7 @@ def Clean(self,package,folder):
         if package in ['process','commons','configuration','test']:
             logfile = folder+'/cleanup.log'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             logfile = folder+'/cleanup_'+package[5:]+'.log'
         else:
             logfile = folder+'/cleanup_'+package+'.log'
@@ -444,7 +469,7 @@ def Clean(self,package,folder):
         if package in ['process','commons','test','configuration']:
             makefile = 'Makefile'
         elif package in ['test_process','test_commons','test_zlib','test_fastjet',\
-                         'test_root','test_delphes','test_delphesMA5tune']:
+                         'test_root','test_delphes','test_delphesMA5tune','test_onnx']:
             makefile = 'Makefile_'+package[5:]
         else:
             makefile = 'Makefile_'+package
@@ -469,7 +494,7 @@ def MrProper(self,package,folder):
         if package in ['process','commons','configuration']:
             logfile = folder+'/mrproper.log'
         elif package in ['test_process','test_commons','test_zlib','test_root','test_fastjet',\
-                         'test_delphes','test_delphesMA5tune']:
+                         'test_delphes','test_delphesMA5tune','test_onnx']:
             logfile = folder+'/mrproper_'+package[5:]+'.log'
         else:
             logfile = folder+'/mrproper_'+package+'.log'
@@ -480,7 +505,7 @@ def MrProper(self,package,folder):
         if package in ['process','commons','test','configuration']:
             makefile = 'Makefile'
         elif package in ['test_process','test_commons','test_zlib','test_root','test_fastjet',\
-                         'test_delphes','test_delphesMA5tune']:
+                         'test_delphes','test_delphesMA5tune','test_onnx']:
             makefile = 'Makefile_'+package[5:]
         else:
             makefile = 'Makefile_'+package
diff --git a/madanalysis/build/makefile_writer.py b/madanalysis/build/makefile_writer.py
index 1c1513ba..e4a2c8a5 100644
--- a/madanalysis/build/makefile_writer.py
+++ b/madanalysis/build/makefile_writer.py
@@ -40,6 +40,7 @@ def __init__(self):
             self.has_fastjet        = False
             self.has_delphes        = False
             self.has_delphesMA5tune = False
+            self.has_onnx           = False 
 
 
     @staticmethod
@@ -95,6 +96,9 @@ def UserfriendlyMakefileForSampleAnalyzer(filename,options):
         if options.has_delphesMA5tune:
             file.write('\tcd Interfaces && $(MAKE) -f Makefile_delphesMA5tune\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_delphesMA5tune\n')
+        if options.has_onnx:
+            file.write('\tcd Interfaces && $(MAKE) -f Makefile_onnx\n')
+            file.write('\tcd Test && $(MAKE) -f Makefile_onnx\n')
         if options.has_process:
             file.write('\tcd Process && $(MAKE) -f Makefile\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_process\n')
@@ -121,6 +125,9 @@ def UserfriendlyMakefileForSampleAnalyzer(filename,options):
         if options.has_delphesMA5tune:
             file.write('\tcd Interfaces && $(MAKE) -f Makefile_delphesMA5tune clean\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_delphesMA5tune clean\n')
+        if options.has_onnx:
+            file.write('\tcd Interfaces && $(MAKE) -f Makefile_onnx clean\n')
+            file.write('\tcd Test && $(MAKE) -f Makefile_onnx clean\n')
         if options.has_process:
             file.write('\tcd Process && $(MAKE) -f Makefile clean\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_process clean\n')
@@ -148,6 +155,9 @@ def UserfriendlyMakefileForSampleAnalyzer(filename,options):
         if options.has_delphesMA5tune:
             file.write('\tcd Interfaces && $(MAKE) -f Makefile_delphesMA5tune mrproper\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_delphesMA5tune mrproper\n')
+        if options.has_onnx:
+            file.write('\tcd Interfaces && $(MAKE) -f Makefile_onnx mrproper\n')
+            file.write('\tcd Test && $(MAKE) -f Makefile_onnx mrproper\n')
         if options.has_process:
             file.write('\tcd Process && $(MAKE) -f Makefile mrproper\n')
             file.write('\tcd Test && $(MAKE) -f Makefile_process mrproper\n')
@@ -186,6 +196,10 @@ def __init__(self):
             self.has_root_tag              = False
             self.has_root_lib              = False
             self.has_root_ma5lib           = False
+            self.has_onnx_tag              = False
+            self.has_onnx_inc              = False
+            self.has_onnx_lib              = False
+            self.has_onnx_ma5lib           = False
 
 
     @staticmethod
@@ -218,14 +232,14 @@ def Makefile(MakefileName,title,ProductName,ProductPath,isLibrary,cppfiles,hfile
 
         # - general
         cxxflags=[]
-        cxxflags.extend(['-Wall','-std=c++11','-O3','-fPIC', '-I$(MA5_BASE)/tools/']) # general
+        cxxflags.extend(['-Wall','-std=c++14','-O3','-fPIC', '-I$(MA5_BASE)/tools/']) # general
         file.write('CXXFLAGS  = '+' '.join(cxxflags)+'\n')
         for item in moreIncludes:
             file.write('CXXFLAGS += '+' -I'+item+'\n')
 
         # - compilation severity
         if not options.has_root_inc    and not options.has_fastjet_inc and \
-           not options.has_zlib_inc    and \
+           not options.has_zlib_inc    and not options.has_onnx_inc and \
            not options.has_delphes_inc and not options.has_delphesMA5tune_inc:
             
             # - compilation severity level 1
@@ -297,6 +311,12 @@ def Makefile(MakefileName,title,ProductName,ProductPath,isLibrary,cppfiles,hfile
             cxxflags.extend(['-I'+archi_info.zlib_inc_path])
             file.write('CXXFLAGS += '+' '.join(cxxflags)+'\n')
 
+        # - onnx
+        if options.has_onnx_inc:
+            cxxflags=[]
+            cxxflags.extend(['-I'+archi_info.onnx_inc_path])
+            file.write('CXXFLAGS += '+' '.join(cxxflags)+'\n')
+
         # - delphes
         if options.has_delphes_inc:
             cxxflags=[]
@@ -319,6 +339,8 @@ def Makefile(MakefileName,title,ProductName,ProductPath,isLibrary,cppfiles,hfile
             cxxflags.extend(['-DFASTJET_USE'])
         if options.has_zlib_tag:
             cxxflags.extend(['-DZIP_USE'])
+        if options.has_onnx_tag:
+            cxxflags.extend(['-DONNX_USE'])
         if options.has_delphes_tag:
              cxxflags.extend(['-DDELPHES_USE'])
         if options.has_delphesMA5tune_tag:
@@ -357,6 +379,17 @@ def Makefile(MakefileName,title,ProductName,ProductPath,isLibrary,cppfiles,hfile
                 libs.extend(['-lz'])
             file.write('LIBFLAGS += '+' '.join(libs)+'\n')
 
+        # - onnx
+        if options.has_onnx_ma5lib or options.has_onnx_lib:
+            libs=[]
+            if options.has_onnx_ma5lib:
+                libs.extend(['-lonnx_for_ma5'])
+            if options.has_onnx_lib:
+                libs.extend(['-L'+archi_info.onnx_lib_path,'-lonnxruntime'])
+                libs.extend(['-Wl,-rpath,'+archi_info.onnx_lib_path])
+
+            file.write('LIBFLAGS += '+' '.join(libs)+'\n')
+
         # - root
         if options.has_root_ma5lib:
             libs=[]
@@ -435,6 +468,8 @@ def Makefile(MakefileName,title,ProductName,ProductPath,isLibrary,cppfiles,hfile
             libs.append('$(MA5_BASE)/tools/SampleAnalyzer/Lib/libdelphesMA5tune_for_ma5.so')
         if options.has_fastjet_ma5lib:
             libs.append('$(MA5_BASE)/tools/SampleAnalyzer/Lib/libfastjet_for_ma5.so')
+        if options.has_onnx_ma5lib:
+            libs.append('$(MA5_BASE)/tools/SampleAnalyzer/Lib/libonnx_for_ma5.so')
         if len(libs)!=0:
             file.write('# Requirements to check before building\n')
             for ind in range(0,len(libs)):
diff --git a/madanalysis/core/launcher.py b/madanalysis/core/launcher.py
index 3d6aefc0..fa6c1eb7 100644
--- a/madanalysis/core/launcher.py
+++ b/madanalysis/core/launcher.py
@@ -1,6 +1,6 @@
 ################################################################################
 #  
-#  Copyright (C) 2012-2023 Jack Araz, Eric Conte & Benjamin Fuks
+#  Copyright (C) 2012-2022 Jack Araz, Eric Conte & Benjamin Fuks
 #  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
 #  
 #  This file is part of MadAnalysis 5.
@@ -91,6 +91,10 @@ def DefaultInstallCard():
     output.write('# fastjet_veto     = 0 # 0=No, 1=Yes\n')
     output.write('# fastjet_bin_path = /home/fastjet/build/bin/\n')
     output.write('\n')
+    output.write('# -----ONNX-----\n')
+    output.write('# onnx_veto     = 0 # 0=No, 1=Yes\n')
+    output.write('# onnx_bin_path = /home/onnx/build/bin/\n')
+    output.write('\n')
     output.write('# -----PAD-----\n')
     output.write('# pad_veto = 0 # 0=No, 1=Yes\n')
     output.write('# pad_build_path = /home/PAD/build/\n')
@@ -241,8 +245,7 @@ def MainSession(mode,arglist,ma5dir,version,date):
     logging.getLogger('MA5').info("*                  \ \_\\\ \_\ \_\ \_\ \____/                *")
     logging.getLogger('MA5').info("*                   \/_/ \/_/\/_/\/_/\/___/                 *")
     logging.getLogger('MA5').info("*                                                           *")
-    logging.getLogger('MA5').info("*   MA5 release : " + "%-24s" % main.archi_info.ma5_version + \
-                                  "%+15s" % main.archi_info.ma5_date  + "   *")
+    logging.getLogger('MA5').info("*   MA5 release : " + "%-24s" % main.archi_info.ma5_version + "%+15s" % main.archi_info.ma5_date  + "   *")
     logging.getLogger('MA5').info("*                                                           *")
     logging.getLogger('MA5').info("*         Comput. Phys. Commun. 184 (2013) 222-256          *")
     logging.getLogger('MA5').info("*             Eur. Phys. J. C74 (2014) 3103                 *")
@@ -362,8 +365,7 @@ def Usage():
     logging.getLogger('MA5').info(" -v or --version")
     logging.getLogger('MA5').info("    or --release     : display the version number of MadAnalysis")
     logging.getLogger('MA5').info(" -b or --build       : rebuild the SampleAnalyzer static library")
-    logging.getLogger('MA5').info(" -f or --forced      : do not ask for confirmation when MA5 removes "+\
-                                  "a directory or overwrites an object") 
+    logging.getLogger('MA5').info(" -f or --forced      : do not ask for confirmation when MA5 removes a directory or overwrites an object") 
     logging.getLogger('MA5').info(" -s or --script      : quit automatically MA5 when the script is loaded")
     logging.getLogger('MA5').info(" -h or --help        : dump this help")
     logging.getLogger('MA5').info(" -i or --installcard : produce the default installation card in installation_card.dat")
diff --git a/madanalysis/core/library_builder.py b/madanalysis/core/library_builder.py
index cafab529..df22145f 100644
--- a/madanalysis/core/library_builder.py
+++ b/madanalysis/core/library_builder.py
@@ -1,6 +1,6 @@
 ################################################################################
 #  
-#  Copyright (C) 2012-2023 Jack Araz, Eric Conte & Benjamin Fuks
+#  Copyright (C) 2012-2022 Jack Araz, Eric Conte & Benjamin Fuks
 #  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
 #  
 #  This file is part of MadAnalysis 5.
@@ -80,6 +80,8 @@ def checkMA5(self):
             libraries.append(self.archi_info.ma5dir+'/tools/SampleAnalyzer/Lib/libdelphes_for_ma5.so')
         if self.archi_info.has_delphesMA5tune:
             libraries.append(self.archi_info.ma5dir+'/tools/SampleAnalyzer/Lib/libdelphesMA5tune_for_ma5.so')
+        if self.archi_info.has_onnx:
+            libraries.append(self.archi_info.ma5dir+'/tools/SampleAnalyzer/Lib/libonnx_for_ma5.so')
         for library in libraries:
             if not os.path.isfile(library):
                 self.logger.debug('\t-> library '+ library + " not found.")
diff --git a/madanalysis/core/main.py b/madanalysis/core/main.py
index 8d417c65..a8b9455d 100644
--- a/madanalysis/core/main.py
+++ b/madanalysis/core/main.py
@@ -572,6 +572,15 @@ def BuildLibrary(self,forced=False):
                               self.archi_info.ma5dir+'/tools/SampleAnalyzer/Bin/TestZlib',\
                               self.archi_info.ma5dir+'/tools/SampleAnalyzer/Test/',True])
 
+        # ONNX
+        if self.archi_info.has_onnx:
+            libraries.append(['onnx', 'interface to onnx', 'onnx',\
+                              self.archi_info.ma5dir+'/tools/SampleAnalyzer/Lib/libonnx_for_ma5.so',\
+                              self.archi_info.ma5dir+'/tools/SampleAnalyzer/Interfaces',False])
+            libraries.append(['test_onnx','interface to onnx', 'test_onnx',\
+                              self.archi_info.ma5dir+'/tools/SampleAnalyzer/Bin/TestOnnx',\
+                              self.archi_info.ma5dir+'/tools/SampleAnalyzer/Test/',True])
+
         # Fastjet
         if self.archi_info.has_fastjet:
             libraries.append(['FastJet', 'interface to FastJet', 'fastjet',\
@@ -637,6 +646,7 @@ def BuildLibrary(self,forced=False):
         options.has_process        = True
         options.has_test           = True
         options.has_zlib           = self.archi_info.has_zlib
+        options.has_onnx           = self.archi_info.has_onnx
         options.has_fastjet        = self.archi_info.has_fastjet
         options.has_delphes        = self.archi_info.has_delphes
         options.has_delphesMA5tune = self.archi_info.has_delphesMA5tune
diff --git a/madanalysis/input/installation_options.dat b/madanalysis/input/installation_options.dat
index c6350f23..9da2a65f 100644
--- a/madanalysis/input/installation_options.dat
+++ b/madanalysis/input/installation_options.dat
@@ -54,3 +54,8 @@
 # -----SCIPY-----
 # scipy_veto = 0 # 0=No, 1=Yes
 
+# -----ONNX-----
+# onnx_veto     = 0 # 0=No, 1=Yes
+# onnx_includes = /home/onnx/include/
+# onnx_libs     = /home/onnx/lib/
+
diff --git a/madanalysis/install/install_manager.py b/madanalysis/install/install_manager.py
index 17651f52..3aa690ef 100644
--- a/madanalysis/install/install_manager.py
+++ b/madanalysis/install/install_manager.py
@@ -85,6 +85,9 @@ def Execute(self, rawpackage):
         elif package=='simplify':
             from madanalysis.install.install_simplify import InstallSimplify
             installer=InstallSimplify(self.main)
+        elif package=='onnx':
+            from madanalysis.install.install_onnx import InstallOnnx
+            installer=InstallOnnx(self.main)
         else:
             self.logger.error('the package "'+rawpackage+'" is unknown')
             return False
diff --git a/madanalysis/install/install_onnx.py b/madanalysis/install/install_onnx.py
new file mode 100644
index 00000000..31e1dea5
--- /dev/null
+++ b/madanalysis/install/install_onnx.py
@@ -0,0 +1,152 @@
+################################################################################
+#
+#  Copyright (C) 2012-2023 Jack Araz, Eric Conte & Benjamin Fuks
+#  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
+#
+#  This file is part of MadAnalysis 5.
+#  Official website: <https://github.com/MadAnalysis/madanalysis5>
+#
+#  MadAnalysis 5 is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  MadAnalysis 5 is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with MadAnalysis 5. If not, see <http://www.gnu.org/licenses/>
+#
+################################################################################
+
+
+from __future__ import absolute_import
+
+import logging
+import os
+import sys
+
+from shell_command import ShellCommand
+
+from madanalysis.install.install_service import InstallService
+
+
+class InstallOnnx:
+    def __init__(self, main):
+        self.main = main
+        self.installdir = os.path.normpath(self.main.archi_info.ma5dir + "/tools/onnx/")
+        self.toolsdir = os.path.normpath(self.main.archi_info.ma5dir + "/tools")
+        self.tmpdir = self.main.session_info.tmpdir
+        self.downloaddir = self.main.session_info.downloaddir
+        self.untardir = os.path.normpath(self.tmpdir + "/MA5_onnx/")
+        self.ncores = 1
+        self.version = "1.17.1"
+        if self.main.archi_info.isMac :
+            if self.main.archi_info.isARM64: 
+                self.ver_name = "onnxruntime-osx-arm64-"+self.version
+            else : 
+                self.ver_name = "onnxruntime-osx-x86_64-"+self.version
+            self.lib_name = "libonnxruntime."+self.version+".dylib"
+        else : #if not mac is linux 
+            self.ver_name = "onnxruntime-linux-x64-"+self.version
+            self.lib_name = "libonnxruntime.so."+self.version
+
+        self.files = {self.ver_name+".tgz": "https://github.com/microsoft/onnxruntime/releases/download/v"+self.version+"/"+self.ver_name+".tgz"}
+
+    def Detect(self):
+        if not os.path.isdir(self.toolsdir):
+            logging.getLogger("MA5").debug(
+                "The folder '" + self.toolsdir + "' is not found"
+            )
+            return False
+        if not os.path.isdir(self.installdir):
+            logging.getLogger("MA5").debug(
+                "The folder " + self.installdir + "' is not found"
+            )
+            return False
+        return True
+
+    def Remove(self, question=True):
+        from madanalysis.IOinterface.folder_writer import FolderWriter
+        return FolderWriter.RemoveDirectory(self.installdir, question)
+
+    def GetNcores(self):
+        self.ncores = InstallService.get_ncores(
+            self.main.archi_info.ncores, self.main.forced
+        )
+
+    def CreatePackageFolder(self):
+        if not InstallService.create_tools_folder(self.toolsdir):
+            return False
+        if not InstallService.create_package_folder(self.toolsdir, "onnx"):
+            return False
+        return True
+
+    def CreateTmpFolder(self):
+        ok = InstallService.prepare_tmp(self.untardir, self.downloaddir)
+        if ok:
+            self.tmpdir = self.untardir
+        return ok
+
+    def Download(self):
+        # Checking connection with MA5 web site
+        if not InstallService.check_ma5site():
+            return False
+        # Launching wget
+        logname = os.path.normpath(self.installdir + "/wget.log")
+        if not InstallService.wget(self.files, logname, self.downloaddir):
+            return False
+        # Ok
+        return True
+
+    def Unpack(self):
+        # Logname
+        logname = os.path.normpath(self.installdir + "/unpack.log")
+        # Unpacking the tarball
+        ok, packagedir = InstallService.untar(
+            logname, self.downloaddir, self.installdir, self.ver_name+".tgz"
+        )
+        if not ok:
+            return False
+        # Ok: returning the good folder
+        self.tmpdir = packagedir
+        return True
+
+    def Check(self):
+        # Check folders
+        dirs = [self.installdir +"/" +self.ver_name +"/include", self.installdir +"/" +self.ver_name + "/lib"]
+
+        for dir in dirs:
+            if not os.path.isdir(dir):
+                logging.getLogger("MA5").error("folder " + dir + " is missing.")
+                self.display_log()
+                return False
+
+        # Check one header file
+        if not os.path.isfile(self.installdir +"/" +self.ver_name +"/include/onnxruntime_cxx_api.h"):
+            logging.getLogger("MA5").error("header labeled 'include/onnx.h' is missing.")
+            self.display_log()
+            return False
+
+        if (not os.path.isfile(self.installdir +"/" +self.ver_name +"/lib/"+self.lib_name)):
+            logging.getLogger("MA5").error(
+                "libonnxruntime is missing."
+            )
+            self.display_log()
+            return False
+
+        return True
+
+    def display_log(self):
+        logging.getLogger("MA5").error("More details can be found into the log files:")
+        logging.getLogger("MA5").error(
+            " - " + os.path.normpath(self.installdir + "/wget.log")
+        )
+        logging.getLogger("MA5").error(
+            " - " + os.path.normpath(self.installdir + "/unpack.log")
+        )
+
+    def NeedToRestart(self):
+        return True
diff --git a/madanalysis/interpreter/cmd_install.py b/madanalysis/interpreter/cmd_install.py
index 9168bd29..d97e321f 100644
--- a/madanalysis/interpreter/cmd_install.py
+++ b/madanalysis/interpreter/cmd_install.py
@@ -118,6 +118,8 @@ def UpdatePaths():
             return installer.Execute('samples')
         elif args[0]=='zlib':
             return installer.Execute('zlib')
+        elif args[0]=='onnx':
+            return installer.Execute('onnx')
         elif args[0] in ['delphes', 'delphesMA5tune']:
             return inst_delphes(self.main,installer,args[0])
         elif args[0]=='fastjet':
@@ -210,7 +212,7 @@ def UpdatePaths():
     def help(self):
         self.logger.info("   Syntax: install <component>")
         self.logger.info("   Download and install a MadAnalysis component from the official site.")
-        self.logger.info("   List of available components: samples zlib fastjet delphes delphesMA5tune PAD PADForMA5tune PADForSFS")
+        self.logger.info("   List of available components: samples zlib fastjet delphes delphesMA5tune PAD PADForMA5tune PADForSFS onnx")
 
 
     def complete(self,text,args,begidx,endidx):
@@ -224,7 +226,7 @@ def complete(self,text,args,begidx,endidx):
         else:
             output = ["samples","zlib","fastjet", "delphes", "delphesMA5tune",\
                 "gnuplot", "matplotlib", "root" , "numpy", "PAD", "PADForMA5tune",\
-                "PADForSFS", "pyhf"]
+                "PADForSFS", "pyhf", "onnx"]
             return self.finalize_complete(text,output)
 
 
diff --git a/madanalysis/interpreter/ma5_interpreter.py b/madanalysis/interpreter/ma5_interpreter.py
index b0d486c0..bfb89440 100644
--- a/madanalysis/interpreter/ma5_interpreter.py
+++ b/madanalysis/interpreter/ma5_interpreter.py
@@ -361,6 +361,14 @@ def config_update(checkup):
             if not installer.Execute('zlib'):
                 self.logger.error('Impossible to install zlib.')
                 return False
+            
+        # If not onnx -> install onnx
+        if not self.main.archi_info.has_onnx:
+            self.logger.info('The onnx package has not been found. Proceeding with its local installation.')
+            installer=InstallManager(self.main)
+            if not installer.Execute('onnx'):
+                self.logger.error('Impossible to install onnx.')
+                return False
 
         # If not fastjet -> install fastjet
         if not self.main.archi_info.has_fastjet:
diff --git a/madanalysis/system/architecture_info.py b/madanalysis/system/architecture_info.py
index 6106ad05..474781b5 100644
--- a/madanalysis/system/architecture_info.py
+++ b/madanalysis/system/architecture_info.py
@@ -37,6 +37,7 @@ def __init__(self):
 
         # Main flags
         self.isMac = False
+        self.isARM64 = False
 
         # Is there optional package?
         self.has_root           = False
@@ -44,6 +45,7 @@ def __init__(self):
         self.has_zlib           = False
         self.has_delphes        = False
         self.has_delphesMA5tune = False
+        self.has_onnx           = False 
 
         # Library to put before all the others?
         self.root_priority           = False
@@ -51,6 +53,7 @@ def __init__(self):
         self.delphes_priority        = False
         self.delphesMA5tune_priority = False
         self.fastjet_priority        = False
+        self.onnx_priority           = False 
 
         # Library files
         self.zlib_original_libs           = []
@@ -58,6 +61,8 @@ def __init__(self):
         self.root_original_bins           = []
         self.delphes_original_libs        = []
         self.delphesMA5tune_original_libs = []
+        self.onnx_original_libs           = []
+
 
         # Version
         self.python_version   = ""
@@ -88,6 +93,9 @@ def __init__(self):
         self.zlib_inc_path=""
         self.zlib_lib_path=""
         self.zlib_lib=""
+        self.onnx_inc_path=""
+        self.onnx_lib_path=""
+        self.onnx_lib=""
         self.delphes_inc_paths=[]
         self.delphes_lib_paths=[]
         self.delphes_lib=""
diff --git a/madanalysis/system/checkup.py b/madanalysis/system/checkup.py
index b12c7e94..902afe3f 100644
--- a/madanalysis/system/checkup.py
+++ b/madanalysis/system/checkup.py
@@ -1,6 +1,6 @@
 ################################################################################
 #  
-#  Copyright (C) 2012-2023 Jack Araz, Eric Conte & Benjamin Fuks
+#  Copyright (C) 2012-2022 Jack Araz, Eric Conte & Benjamin Fuks
 #  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
 #  
 #  This file is part of MadAnalysis 5.
@@ -63,6 +63,8 @@ def CheckArchitecture(self):
         if self.archi_info.platform.lower() in ['darwin','mac','macosx']:
             self.archi_info.isMac = True
             platform_text+='\x1b[32m'+'[MAC/OSX mode]'+'\x1b[0m'
+            if platform.machine().lower() != "x86_64" :
+                self.archi_info.isARM64 = True 
         else:
             self.archi_info.isMac = False
             platform_text+='\x1b[32m'+'[Linux mode]'+'\x1b[0m'
@@ -324,6 +326,8 @@ def CheckOptionalProcessingPackages(self):
             return False
         if not self.checker.Execute('root'):
             return False
+        if not self.checker.Execute('onnx'):
+            return False
 
         self.archi_info.has_delphes           = checker2.checkDelphes()
         self.archi_info.has_delphesMA5tune    = checker2.checkDelphesMA5tune()
@@ -346,6 +350,8 @@ def CheckOptionalReinterpretationPackages(self):
             return False
         if not self.checker.Execute('simplify'):
             return False
+        if not self.checker.Execute('onnx'):
+            return False
         return True
 
 
@@ -532,13 +538,6 @@ def SetFolder(self):
         self.logger.debug('after DYLD_LIBRARY_PATH='+str(os.environ['DYLD_LIBRARY_PATH']))
         self.logger.debug('--------')
 
-        # ROOT INCLUDE PATH
-        if self.archi_info.has_delphes:
-            os.environ['ROOT_INCLUDE_PATH']=os.path.join(self.archi_info.ma5dir,'tools','delphes','external');
-        if self.archi_info.has_delphesMA5tune:
-            os.environ['ROOT_INCLUDE_PATH']=os.path.join(self.archi_info.ma5dir,'tools','delphesMA5tune','external');
-
-
         self.logger.debug('-------- END: set environment variables --------')
 
         return True
diff --git a/madanalysis/system/detect_manager.py b/madanalysis/system/detect_manager.py
index 6b1edd9a..80582d1e 100644
--- a/madanalysis/system/detect_manager.py
+++ b/madanalysis/system/detect_manager.py
@@ -54,6 +54,9 @@ def Execute(self, rawpackage):
         if package=='zlib':
             from madanalysis.system.detect_zlib import DetectZlib
             checker=DetectZlib(self.archi_info, self.user_info, self.session_info, self.debug)
+        elif package=='onnx':
+            from madanalysis.system.detect_onnx import DetectONNX
+            checker=DetectONNX(self.archi_info, self.user_info, self.session_info, self.debug)
         elif package=='fastjet':
             from madanalysis.system.detect_fastjet import DetectFastjet
             checker=DetectFastjet(self.archi_info, self.user_info, self.session_info, self.debug)
diff --git a/madanalysis/system/detect_onnx.py b/madanalysis/system/detect_onnx.py
new file mode 100644
index 00000000..5ca934b3
--- /dev/null
+++ b/madanalysis/system/detect_onnx.py
@@ -0,0 +1,133 @@
+################################################################################
+#  
+#  Copyright (C) 2012-2022 Jack Araz, Eric Conte & Benjamin Fuks
+#  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
+#  
+#  This file is part of MadAnalysis 5.
+#  Official website: <https://github.com/MadAnalysis/madanalysis5>
+#  
+#  MadAnalysis 5 is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#  
+#  MadAnalysis 5 is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+#  GNU General Public License for more details.
+#  
+#  You should have received a copy of the GNU General Public License
+#  along with MadAnalysis 5. If not, see <http://www.gnu.org/licenses/>
+#  
+################################################################################
+
+
+from __future__ import absolute_import
+import logging
+import glob
+import os
+import sys
+import re
+import platform
+from shell_command  import ShellCommand
+from madanalysis.enumeration.detect_status_type import DetectStatusType
+
+
+class DetectONNX:
+
+    def __init__(self, archi_info, user_info, session_info, debug):
+        # mandatory options
+        self.archi_info   = archi_info
+        self.user_info    = user_info
+        self.session_info = session_info
+        self.debug        = debug
+        self.name         = 'ONNXRunTime'
+        self.mandatory    = False
+        self.force        = False 
+        self.log          = []
+        self.logger       = logging.getLogger('MA5')
+        self.version = "1.17.1"
+        if self.archi_info.isMac :
+            if self.archi_info.isARM64: 
+                self.ver_name = "onnxruntime-osx-arm64-"+self.version
+            else : 
+                self.ver_name = "onnxruntime-osx-x86_64-"+self.version
+            self.lib_name = "libonnxruntime."+self.version+".dylib"
+        else : #if not mac is linux 
+            self.ver_name = "onnxruntime-linux-x64-"+self.version  
+            self.lib_name = "libonnxruntime.so."+self.version       
+        # NAme of the header
+        self.headernames=['onnxruntime_cxx_api.h']
+        
+        # Name of the dynamic lib
+        self.libnames=[self.lib_name] 
+
+        # adding what you want here
+
+
+    def PrintDisableMessage(self):
+        self.logger.warning("ONNXRunTime is disabled. Cannot use .onnx files.")
+        
+
+    def IsItVetoed(self):
+        if self.user_info.onnx_veto:
+            self.logger.debug("user setting: veto on ONNX")
+            return True
+        else:
+            self.logger.debug("no user veto")
+            return False
+
+        
+    def ToolsDetection(self):
+
+        # Check
+        pathname = os.path.normpath(self.archi_info.ma5dir+'/tools/onnx/'+self.ver_name)
+        self.logger.debug("Look for onnx folder in path "+pathname+" ...")
+        if not os.path.isdir(pathname):
+            self.logger.debug("-> not found")
+            return DetectStatusType.UNFOUND, ''
+        else:
+            self.logger.debug("-> found")
+
+        # headers
+        result1 = self.LookForPattern(pathname+'/include/',self.headernames)
+        test1   = (len(result1)!=0)
+
+        # libs
+        result2 = self.LookForPattern(pathname+'/lib/',self.libnames)
+        test2   = (len(result2)!=0)
+            
+        # Return
+        if test1 and test2:
+            self.header_files  = result1
+            self.library_files = result2
+            return DetectStatusType.FOUND, ''
+        else:
+            return DetectStatusType.UNFOUND, ''
+
+    def LookForPattern(self,path,patterns):
+        result=[]
+        for pattern in patterns:
+            filename=os.path.normpath(path+'/'+pattern)
+            self.logger.debug('look for pattern '+filename+' ...')
+            thefiles = glob.glob(filename)
+            for thefile in thefiles:
+                if thefile not in result:
+                    self.logger.debug('-> found: '+thefile)
+                    result.append(thefile)
+        if len(result)==0:
+            self.logger.debug('-> no file found')
+        return result
+
+    def SaveInfo(self):
+        self.session_info.has_onnx   = True
+        self.archi_info.has_onnx     = True
+        self.archi_info.onnx_priority      = self.force
+        self.archi_info.onnx_lib           = self.library_files[0]
+        self.archi_info.onnx_inc_path      = os.path.dirname(self.header_files[0])
+        self.archi_info.onnx_lib_path      = os.path.dirname(self.library_files[0])
+        self.archi_info.onnx_original_libs.extend([fl for fl in self.library_files if not fl in self.archi_info.onnx_original_libs])
+
+        return True
+
+
diff --git a/madanalysis/system/session_info.py b/madanalysis/system/session_info.py
index e43adf2a..4db82854 100644
--- a/madanalysis/system/session_info.py
+++ b/madanalysis/system/session_info.py
@@ -39,6 +39,7 @@ def __init__(self):
         self.has_gnuplot        = False
         self.has_pdflatex       = False
         self.has_latex          = False
+        self.has_onnx           = False 
         self.has_dvipdf         = False
         self.has_web            = True
         self.has_pad            = False
diff --git a/madanalysis/system/user_info.py b/madanalysis/system/user_info.py
index 1ee5ec9c..fb2c703d 100644
--- a/madanalysis/system/user_info.py
+++ b/madanalysis/system/user_info.py
@@ -63,6 +63,11 @@ def __init__(self):
         self.zlib_includes = None
         self.zlib_libs     = None
 
+        # Onnx
+        self.onnx_veto     = None
+        self.onnx_veto_includes = None
+        self.onnx_libs     = None
+
         # Fastjet
         self.fastjet_veto     = None
         self.fastjet_bin_path = None
diff --git a/tools/SampleAnalyzer/Test/Onnx/Test.cpp b/tools/SampleAnalyzer/Test/Onnx/Test.cpp
new file mode 100644
index 00000000..3499c3f6
--- /dev/null
+++ b/tools/SampleAnalyzer/Test/Onnx/Test.cpp
@@ -0,0 +1,47 @@
+////////////////////////////////////////////////////////////////////////////////
+//  
+//  Copyright (C) 2012-2023 Jack Araz, Eric Conte & Benjamin Fuks
+//  The MadAnalysis development team, email: <ma5team@iphc.cnrs.fr>
+//  
+//  This file is part of MadAnalysis 5.
+//  Official website: <https://github.com/MadAnalysis/madanalysis5>
+//  
+//  MadAnalysis 5 is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//  
+//  MadAnalysis 5 is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+//  GNU General Public License for more details.
+//  
+//  You should have received a copy of the GNU General Public License
+//  along with MadAnalysis 5. If not, see <http://www.gnu.org/licenses/>
+//  
+////////////////////////////////////////////////////////////////////////////////
+
+
+// SampleHeader headers
+#include "SampleAnalyzer/Commons/DataFormat/EventFormat.h"
+#include "SampleAnalyzer/Commons/DataFormat/SampleFormat.h"
+#include "onnxruntime_cxx_api.h"
+
+
+using namespace MA5;
+
+// -----------------------------------------------------------------------
+// main program
+// -----------------------------------------------------------------------
+MAint32 main(MAint32 argc, MAchar *argv[])
+{
+  std::cout << "BEGIN-SAMPLEANALYZER-TEST" << std::endl;
+  std::cout << std::endl;
+  Ort::Env env;
+
+  EventFormat  event;
+  SampleFormat sample;
+
+  std::cout << "END-SAMPLEANALYZER-TEST" << std::endl;
+  return 0;
+}