diff --git a/.github/workflows/reusable-ubuntu-ci.yml b/.github/workflows/reusable-ubuntu-ci.yml
index bd5dfc16..c565974e 100644
--- a/.github/workflows/reusable-ubuntu-ci.yml
+++ b/.github/workflows/reusable-ubuntu-ci.yml
@@ -36,7 +36,7 @@ on:
         description: 'Branch or tag of Fast CDR repository (https://github.com/eProsima/Fast-CDR)'
         required: false
         type: string
-        default: 'master'
+        default: '2.3.x'
       run-build:
         description: 'Build Fast DDS Python (CI skipped otherwise)'
         required: false
diff --git a/.github/workflows/reusable-windows-ci.yml b/.github/workflows/reusable-windows-ci.yml
index 48673c5c..3684aa3a 100644
--- a/.github/workflows/reusable-windows-ci.yml
+++ b/.github/workflows/reusable-windows-ci.yml
@@ -46,7 +46,7 @@ on:
         description: 'Branch or tag of Fast CDR repository (https://github.com/eProsima/Fast-CDR)'
         required: false
         type: string
-        default: 'master'
+        default: '2.3.x'
       run-build:
         description: 'Build Fast DDS Python (CI skipped otherwise)'
         required: false
diff --git a/fastdds_python.repos b/fastdds_python.repos
index 1dd5c86f..7045161d 100644
--- a/fastdds_python.repos
+++ b/fastdds_python.repos
@@ -6,7 +6,7 @@ repositories:
     fastcdr:
         type: git
         url: https://github.com/eProsima/Fast-CDR.git
-        version: master
+        version: 2.3.x
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git