diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ab137ec..aa4cb591 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ enable_testing()
 
 
 project (OpenMesh 
-         VERSION 9.0.0
+         VERSION 9.1.0
          LANGUAGES C CXX ) 
 
 # Set AUTO UIC/MOC Policy to new for CMAKE 3.17 or higher
diff --git a/Doc/changelog.docu b/Doc/changelog.docu
index 0ca70502..857f45d4 100644
--- a/Doc/changelog.docu
+++ b/Doc/changelog.docu
@@ -6,6 +6,10 @@
 
 <!-- --------------------------------------------------------------------- -->
 
+<tr valign=top><td><b>9.1</b> (?/?/?)</td><td>
+
+</tr>
+
 
 <tr valign=top><td><b>9.0</b> (2022/01/18)</td><td>
 
diff --git a/src/OpenMesh/Core/System/config.h b/src/OpenMesh/Core/System/config.h
index 8ee6956b..f6c5db98 100644
--- a/src/OpenMesh/Core/System/config.h
+++ b/src/OpenMesh/Core/System/config.h
@@ -58,7 +58,7 @@
 // ----------------------------------------------------------------------------
 
 
-#define OM_VERSION 0x90000
+#define OM_VERSION 0x90100
 //#define OM_VERSION 0x70200
 
 #define OM_GET_VER ((OM_VERSION & 0xf0000) >> 16)