diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7aaabc2..084f338 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,11 +1,15 @@
 v0.x.x
 =============
 * Current version.
+
+v0.5.1
+=============
 * Fix bug in bolometer coordinates in the focal plane (it was mixed with pair coordinates).
 * Allow routine in HealpixFitsMap to read alms files directly.
 * Allow the mapping per detector pair to save memory.
 * Remove the notebooks from the repo (now at `s4cmb_notebooks <https://github.com/JulienPeloton/s4cmb_notebooks>`_ ).
 * Add new routines to simulate differential pointing.
+* Add new routines to define detectors gain.
 
 v0.5.0
 =============
diff --git a/setup.py b/setup.py
index d21676b..9553140 100644
--- a/setup.py
+++ b/setup.py
@@ -53,13 +53,14 @@ def configuration(parent_package='', top_path=None):
                                  'simple_parameters.ini',
                                  'so_parameters.ini',
                                  'xpure_parameters.ini',
+                                 'so_flat_MC_app.py',
                                  'nersc_cori.batch']}
 
     setup(
         configuration=configuration,
-        version='0.5.0',
+        version='0.5.1',
         url='https://github.com/JulienPeloton/s4cmb',
-        download_url='https://github.com/JulienPeloton/s4cmb/archive/0.5.0.tar.gz',
+        download_url='https://github.com/JulienPeloton/s4cmb/archive/0.5.1.tar.gz',
         license='GPL-3.0',
         author='Julien Peloton',
         author_email='j.peloton@sussex.ac.uk',