diff --git a/Doxyfile b/Doxyfile
index d8269fce0..20d5ae219 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = smack
-PROJECT_NUMBER         = 1.8.1
+PROJECT_NUMBER         = 1.9.0
 PROJECT_BRIEF          = "A bounded software verifier."
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = docs
diff --git a/share/smack/reach.py b/share/smack/reach.py
index 0b39400c8..5c6063456 100755
--- a/share/smack/reach.py
+++ b/share/smack/reach.py
@@ -11,7 +11,7 @@
 from smackgen import *
 from smackverify import *
 
-VERSION = '1.8.1'
+VERSION = '1.9.0'
 
 def reachParser():
     parser = argparse.ArgumentParser(add_help=False, parents=[verifyParser()])
diff --git a/share/smack/top.py b/share/smack/top.py
index 330ff4fde..753d08543 100755
--- a/share/smack/top.py
+++ b/share/smack/top.py
@@ -14,7 +14,7 @@
 from utils import temporary_file, try_command, remove_temp_files
 from replay import replay_error_trace
 
-VERSION = '1.8.1'
+VERSION = '1.9.0'
 
 def frontends():
   """A dictionary of front-ends per file extension."""
diff --git a/svcomp/bench/src/benchexec/benchexec/tools/smack_benchexec_driver.py b/svcomp/bench/src/benchexec/benchexec/tools/smack_benchexec_driver.py
index 68bbc385e..24b03b6f3 100644
--- a/svcomp/bench/src/benchexec/benchexec/tools/smack_benchexec_driver.py
+++ b/svcomp/bench/src/benchexec/benchexec/tools/smack_benchexec_driver.py
@@ -35,7 +35,7 @@ def version(self, executable):
         Sets the version number for SMACK, which gets displayed in the "Tool" row
         in BenchExec table headers.
         """
-        return '1.8.1'
+        return '1.9.0'
 
     def name(self):
         """