diff --git a/.appveyor.yml b/.appveyor.yml
index b3b9b74..8a58df6 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -20,8 +20,8 @@ configuration:
 
 environment:
     COMMS_BRANCH: v5.2.1
-    COMMSDSL_BRANCH: v6.2.1
-    CC_TOOLS_QT_BRANCH: v4.2.1
+    COMMSDSL_BRANCH: v6.2.4
+    CC_TOOLS_QT_BRANCH: v4.2.3
     matrix:
         - CPP_STD: 11
         - CPP_STD: 14
diff --git a/.github/workflows/actions_build.yml b/.github/workflows/actions_build.yml
index 73171eb..6c52846 100644
--- a/.github/workflows/actions_build.yml
+++ b/.github/workflows/actions_build.yml
@@ -4,8 +4,8 @@ on: [push]
 
 env:
   COMMS_BRANCH: v5.2.1
-  COMMSDSL_BRANCH: v6.2.1
-  CC_TOOLS_QT_BRANCH: v4.2.1
+  COMMSDSL_BRANCH: v6.2.4
+  CC_TOOLS_QT_BRANCH: v4.2.3
 
 jobs:
   build_gcc_old_ubuntu_20_04:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4f0051..eee4b71 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,8 +30,8 @@ option (MQTTSN_BUILD_EMSCRIPTEN "Build and install project generated by the comm
 # COMMSDSL2SWIG_EXTRA_ARGS - Extra arguments to pass to "commsdsl2swig"
 # COMMSDSL2EMSCRIPTEN_EXTRA_ARGS - Extra arguments to pass to "commsdsl2emscripten"
 
-set (MQTTSN_VERSION "2.4")
-set (MQTTSN_MIN_COMMSDSL_VERSION "6.2.1")
+set (MQTTSN_VERSION "2.5")
+set (MQTTSN_MIN_COMMSDSL_VERSION "6.2.4")
 
 set (EXTERNALS_DIR "${PROJECT_SOURCE_DIR}/externals")