diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 20e690be9a109b18fded70279389da366ccc11aa..1a6376dd3b1b10f7f2c35e7ffb0de972cc19747d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,9 @@
 =========
 CHANGELOG
 =========
+- 1.2.3
+    Add IPC2 pKa values (thanks Lukasz Kozlowski, see https://doi.org/10.1093/nar/gkab295). Add RPG's publication on documentation
+
 - 1.2.2
     Correct a major bug arising when a new enzyme is define with at least 3 amino acids while the first one being the cleaving site
 
diff --git a/docs/conf.py b/docs/conf.py
index b725c54161897bb5cf4097bc7b21742e82c85aa0..180657cd67d5f978f7b57ca06e52944f055a624c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,7 +26,7 @@ author = 'Nicolas Maillet'
 # The short X.Y version
 version = ''
 # The full version, including alpha/beta/rc tags
-release = '1.2.2'
+release = '1.2.3'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/rpg/RapidPeptidesGenerator.py b/rpg/RapidPeptidesGenerator.py
index de832b1157278df9289b18a32488b9e6bda48420..259def22554faf54269fd9f3ab0b7a96b273abaa 100644
--- a/rpg/RapidPeptidesGenerator.py
+++ b/rpg/RapidPeptidesGenerator.py
@@ -29,7 +29,7 @@
 necessary functions
 """
 
-__version_info__ = ('1', '2', '2')
+__version_info__ = ('1', '2', '3')
 __version__ = '.'.join(__version_info__)
 __revision_date__ = "2021-02-03"
 __author__ = "Nicolas Maillet"
diff --git a/setup.py b/setup.py
index e59629daec51363675f4ef906ba7b2dc29f9c137..10a2b388342e993056b1c01f43d170ca7f448b05 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ setup(
     # For a discussion on single-sourcing the version across setup.py and the
     # project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='1.2.2',  # Required
+    version='1.2.3',  # Required
 
     # This is a one-line description or tagline of what your project does. This
     # corresponds to the "Summary" metadata field: