diff --git a/CHANGELOG.md b/CHANGELOG.md
index 482da94..bcd7f4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## v1.3.0 (August 2024)
 
 ### Changes
+ - [#114](https://github.com/FreeRTOS/coreMQTT-Agent/pull/114) Update CMock submodule pointer to latest version v2.5.3.
  - [#111](https://github.com/FreeRTOS/coreMQTT-Agent/pull/111) Update coreMQTT-Agent to work with the coreMQTT v2.3.1.
  - [#110](https://github.com/FreeRTOS/coreMQTT-Agent/pull/110) Fix MISRA violation.
  - [#109](https://github.com/FreeRTOS/coreMQTT-Agent/pull/109) Update CMakeList optionally build UT/Coverity & Update Coverity configuration.
diff --git a/manifest.yml b/manifest.yml
index 10ff8a0..629ab9d 100644
--- a/manifest.yml
+++ b/manifest.yml
@@ -12,7 +12,7 @@ dependencies:
       path: source/dependency/coreMQTT
 
   - name: "CMock"
-    version: "3b443e5"
+    version: "v2.5.3"
     repository:
       type: "git"
       url: " https://github.com/ThrowTheSwitch/CMock.git"
diff --git a/test/unit-test/CMock b/test/unit-test/CMock
index 3b443e5..9d09289 160000
--- a/test/unit-test/CMock
+++ b/test/unit-test/CMock
@@ -1 +1 @@
-Subproject commit 3b443e551d538e93e86ec7bb56a0d7fde3715a3c
+Subproject commit 9d092898ef26ece140d9225e037274b64d4f851e