diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index b9708ac..aa9719d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,10 @@
 CHANGELOG
 =========
 
+1.2.2 (layer_v9)
+===================
+* Fix bug on calculating active millis since start.
+
 1.2.1 (layer_v8)
 ===================
 * Fix bug for module path for Fargate.
diff --git a/codeguru_profiler_agent/agent_metadata/agent_metadata.py b/codeguru_profiler_agent/agent_metadata/agent_metadata.py
index 28ef181..006e7a7 100644
--- a/codeguru_profiler_agent/agent_metadata/agent_metadata.py
+++ b/codeguru_profiler_agent/agent_metadata/agent_metadata.py
@@ -9,7 +9,7 @@
 # NOTE: Please do not alter the value for the following constants without the full knowledge of the use of them.
 # These constants are used in several scripts, including setup.py.
 __agent_name__ = "CodeGuruProfiler-python"
-__agent_version__ = "1.2.1"
+__agent_version__ = "1.2.2"
 
 
 def look_up_fleet_info(