diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5efa74bd84..897ea591a0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.10.2 FATAL_ERROR)
 #============================================================================
 # Initialize the project
 #============================================================================
-project(ignition-gazebo6 VERSION 6.11.0)
+project(ignition-gazebo6 VERSION 6.12.0)
 set (GZ_DISTRIBUTION "Fortress")
 
 #============================================================================
diff --git a/Changelog.md b/Changelog.md
index d9bb90509e..2487f3b1ce 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,19 @@
 ## Ignition Gazebo 6.x
 
+### Gazebo Sim 6.12.0 (2022-08-30)
+
+1. Add topic parameter to thrust plugin
+    * [Pull request #1681](https://github.com/gazebosim/gz-sim/pull/1681)
+
+1. Add information about `<topic>` system parameter
+    * [Pull request #1671](https://github.com/gazebosim/gz-sim/pull/1671)
+
+1. Adding tests for hydrodynamics
+    * [Pull request #1617](https://github.com/gazebosim/gz-sim/pull/1617)
+
+1. Fix Windows and Doxygen
+    * [Pull request #1643](https://github.com/gazebosim/gz-sim/pull/1643)
+
 ### Gazebo Sim 6.11.0 (2022-08-17)
 
 1. Add support for specifying log record period
diff --git a/Migration.md b/Migration.md
index 58a4e5c815..ea3bdeea7c 100644
--- a/Migration.md
+++ b/Migration.md
@@ -5,6 +5,12 @@ Deprecated code produces compile-time warnings. These warning serve as
 notification to users that their code should be upgraded. The next major
 release will remove the deprecated code.
 
+## Ignition Gazebo 6.11.X to 6.12.X
+
+ * **Modified**:
+   + In the Hydrodynamics plugin, inverted the added mass contribution to make it
+     act in the correct direction.
+
 ## Ignition Gazebo 6.1 to 6.2
 
 * If no `<namespace>` is given to the `Thruster` plugin, the namespace now