diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7370d855..22dd03fe0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ project (sdformat12)
 set (SDF_PROTOCOL_VERSION 1.9)
 
 set (SDF_MAJOR_VERSION 12)
-set (SDF_MINOR_VERSION 0)
+set (SDF_MINOR_VERSION 1)
 set (SDF_PATCH_VERSION 0)
 
 set (SDF_VERSION ${SDF_MAJOR_VERSION}.${SDF_MINOR_VERSION})
diff --git a/Changelog.md b/Changelog.md
index 49da122bf..46cc3d6b9 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 ## libsdformat 12.X
 
+### libsdformat 12.1.0 (2021-11-09)
+
+1. Support accessing mutable sensor types.
+    * [Pull request #737](https://github.com/ignitionrobotics/sdformat/pull/737)
+
 ### libsdformat 12.0.0 (2021-09-30)
 
 1. Make exception for plugins when checking for name uniqueness