diff --git a/CHANGELOG b/CHANGELOG
index 7d7019e..922e52d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,11 @@
 # RELEASE.MAJOR.MINOR
 
+0.23.1
+    Added ./cor/bitset.h
+    Added foreach tests
+    Updating foreach macros with the new iterators API
+    Bug fixes for ./cmc/hashmultiset.h
+
 0.23.0
     Added ./cmc/bitset.h
     Added ./utl/futils.h
diff --git a/README.md b/README.md
index b2b2841..d85b64f 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 <p align="center">
     <a href="https://github.com/LeoVen/C-Macro-Collections/blob/master/LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License"/></a>
-    <img src="https://img.shields.io/badge/Version-v0.23.0-orange.svg" alt="Version"/>
+    <img src="https://img.shields.io/badge/Version-v0.23.1-orange.svg" alt="Version"/>
     <a href="https://travis-ci.org/LeoVen/C-Macro-Collections"><img src="https://travis-ci.org/LeoVen/C-Macro-Collections.svg?branch=master" alt="travis-ci"/></a>
     <a href="https://codecov.io/gh/LeoVen/C-Macro-Collections"><img src="https://codecov.io/gh/LeoVen/C-Macro-Collections/branch/master/graph/badge.svg" alt="codecov"/></a>
     <img src="https://github.com/LeoVen/C-Macro-Collections/workflows/Test%20Suit/badge.svg?branch=master" alt="test_suit"/>
diff --git a/docs/Introduction/introduction.html b/docs/Introduction/introduction.html
index 2290474..dcf6232 100644
--- a/docs/Introduction/introduction.html
+++ b/docs/Introduction/introduction.html
@@ -159,7 +159,7 @@
 </p>
 <p align="center">
     <a href="https://github.com/LeoVen/C-Macro-Collections/blob/master/LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License"/></a>
-    <img src="https://img.shields.io/badge/Version-v0.23.0-orange.svg" alt="Version"/>
+    <img src="https://img.shields.io/badge/Version-v0.23.1-orange.svg" alt="Version"/>
     <a href="https://travis-ci.org/LeoVen/C-Macro-Collections"><img src="https://travis-ci.org/LeoVen/C-Macro-Collections.svg?branch=master" alt="travis-ci"/></a>
     <a href="https://codecov.io/gh/LeoVen/C-Macro-Collections"><img src="https://codecov.io/gh/LeoVen/C-Macro-Collections/branch/master/graph/badge.svg" alt="codecov"/></a>
     <img src="https://github.com/LeoVen/C-Macro-Collections/workflows/Test%20Suit/badge.svg?branch=master" alt="test_suit"/>
diff --git a/docs/index.html b/docs/index.html
index 9879b31..cfa14d1 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -159,7 +159,7 @@
 </p>
 <p align="center">
     <a href="https://github.com/LeoVen/C-Macro-Collections/blob/master/LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License"/></a>
-    <img src="https://img.shields.io/badge/Version-v0.23.0-orange.svg" alt="Version"/>
+    <img src="https://img.shields.io/badge/Version-v0.23.1-orange.svg" alt="Version"/>
     <a href="https://travis-ci.org/LeoVen/C-Macro-Collections"><img src="https://travis-ci.org/LeoVen/C-Macro-Collections.svg?branch=master" alt="travis-ci"/></a>
     <a href="https://codecov.io/gh/LeoVen/C-Macro-Collections"><img src="https://codecov.io/gh/LeoVen/C-Macro-Collections/branch/master/graph/badge.svg" alt="codecov"/></a>
     <img src="https://github.com/LeoVen/C-Macro-Collections/workflows/Test%20Suit/badge.svg?branch=master" alt="test_suit"/>
diff --git a/docs/print.html b/docs/print.html
index a8a34e1..91220f7 100644
--- a/docs/print.html
+++ b/docs/print.html
@@ -161,7 +161,7 @@
 </p>
 <p align="center">
     <a href="https://github.com/LeoVen/C-Macro-Collections/blob/master/LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License"/></a>
-    <img src="https://img.shields.io/badge/Version-v0.23.0-orange.svg" alt="Version"/>
+    <img src="https://img.shields.io/badge/Version-v0.23.1-orange.svg" alt="Version"/>
     <a href="https://travis-ci.org/LeoVen/C-Macro-Collections"><img src="https://travis-ci.org/LeoVen/C-Macro-Collections.svg?branch=master" alt="travis-ci"/></a>
     <a href="https://codecov.io/gh/LeoVen/C-Macro-Collections"><img src="https://codecov.io/gh/LeoVen/C-Macro-Collections/branch/master/graph/badge.svg" alt="codecov"/></a>
     <img src="https://github.com/LeoVen/C-Macro-Collections/workflows/Test%20Suit/badge.svg?branch=master" alt="test_suit"/>
diff --git a/documentation/Introduction/introduction.md b/documentation/Introduction/introduction.md
index f92f970..c558af0 100644
--- a/documentation/Introduction/introduction.md
+++ b/documentation/Introduction/introduction.md
@@ -13,7 +13,7 @@
 
 <p align="center">
     <a href="https://github.com/LeoVen/C-Macro-Collections/blob/master/LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License"/></a>
-    <img src="https://img.shields.io/badge/Version-v0.23.0-orange.svg" alt="Version"/>
+    <img src="https://img.shields.io/badge/Version-v0.23.1-orange.svg" alt="Version"/>
     <a href="https://travis-ci.org/LeoVen/C-Macro-Collections"><img src="https://travis-ci.org/LeoVen/C-Macro-Collections.svg?branch=master" alt="travis-ci"/></a>
     <a href="https://codecov.io/gh/LeoVen/C-Macro-Collections"><img src="https://codecov.io/gh/LeoVen/C-Macro-Collections/branch/master/graph/badge.svg" alt="codecov"/></a>
     <img src="https://github.com/LeoVen/C-Macro-Collections/workflows/Test%20Suit/badge.svg?branch=master" alt="test_suit"/>