diff --git a/Changes b/Changes
index a9442835f0e..e1a9700670a 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,11 @@
+0.23.0.1
+========
+
+Cortex
+-----------------------------------------------------------------------
+
+- Fixed ParameterisedHolder::parameterChanged() exception handling.
+
 0.23.0.0
 ========
 
diff --git a/SConstruct b/SConstruct
index 33c9bed87e3..481048f3612 100644
--- a/SConstruct
+++ b/SConstruct
@@ -51,7 +51,7 @@ import subprocess
 gafferMilestoneVersion = 0 # for announcing major milestones - may contain all of the below
 gafferMajorVersion = 23 # backwards-incompatible changes
 gafferMinorVersion = 0 # new backwards-compatible features
-gafferPatchVersion = 0 # bug fixes
+gafferPatchVersion = 1 # bug fixes
 
 # All of the following must be considered when determining
 # whether or not a change is backwards-compatible