diff --git a/PackageInfo.g b/PackageInfo.g
index 953634b..36fa816 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -15,8 +15,8 @@ SetPackageInfo( rec(
 
 PackageName := "BacktrackKit",
 Subtitle := "An Extensible, easy to understand backtracking framework",
-Version := "0.5.0",
-Date := "03/08/2021", # dd/mm/yyyy format
+Version := "0.5.1",
+Date := "12/11/2021", # dd/mm/yyyy format
 
 
 Persons := [
diff --git a/README.md b/README.md
index 297c94a..584634a 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,11 @@ at https://github.com/peal/BacktrackKit/issues
 
 ## History
 
+0.5.1
+-----
+
+Add IsEven and IsOdd refiners, to more efficiently handle alternating groups
+
 0.5.0
 -----