diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index d4d355b..35da553 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -16,7 +16,7 @@
     In case of bug fixes, please provide the list of supported branches where this fix should be also merged.
     Please uncomment following line, adjusting the corresponding target branches for the backport.
 -->
-<!-- @Mergifyio backport 3.2.x 2.14.x -->
+<!-- @Mergifyio backport 3.3.x 3.2.x 2.14.x -->
 
 <!-- If an issue is already opened, please uncomment next line with the corresponding issue number. -->
 <!-- Fixes #(issue) -->
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index cb4cfb5..1f6d078 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         dest_branch:
-          - '3.3.x'
+          - '3.4.x'
           - '3.x'
     steps:
     - name: Mirror action step
diff --git a/.github/workflows/nightly-ubuntu-ci.yml b/.github/workflows/nightly-ubuntu-ci.yml
index 3b958cd..de04794 100644
--- a/.github/workflows/nightly-ubuntu-ci.yml
+++ b/.github/workflows/nightly-ubuntu-ci.yml
@@ -16,6 +16,16 @@ jobs:
       run-build: true
       use-ccache: false
 
+  nightly-ubuntu-ci-3_3_x:
+    uses: eProsima/ShapesDemo/.github/workflows/reusable-ubuntu-ci.yml@3.3.x
+    with:
+      os-version: 'ubuntu-22.04'
+      label: 'nightly-ubuntu-ci-3.3.x'
+      shapes-demo-branch: '3.3.x'
+      fastdds-branch: '3.3.x'
+      run-build: true
+      use-ccache: false
+
   nightly-ubuntu-ci-3_2_x:
     uses: eProsima/ShapesDemo/.github/workflows/reusable-ubuntu-ci.yml@3.2.x
     with:
diff --git a/.github/workflows/nightly-windows-ci.yml b/.github/workflows/nightly-windows-ci.yml
index 010924c..a2bfd85 100644
--- a/.github/workflows/nightly-windows-ci.yml
+++ b/.github/workflows/nightly-windows-ci.yml
@@ -22,6 +22,22 @@ jobs:
       fastdds-branch: 'master'
       run-build: true
 
+  nightly-windows-ci-3_3_x:
+    strategy:
+      fail-fast: false
+      matrix:
+        vs-toolset:
+          - 'v142'
+          - 'v143'
+    uses: eProsima/ShapesDemo/.github/workflows/reusable-windows-ci.yml@3.3.x
+    with:
+      os-version: 'windows-2022'
+      vs-toolset: ${{ matrix.vs-toolset }}
+      label: 'nightly-windows-${{ matrix.vs-toolset }}-ci-3.3.x'
+      shapes-demo-branch: '3.3.x'
+      fastdds-branch: '3.3.x'
+      run-build: true
+
   nightly-windows-ci-3_2_x:
     strategy:
       fail-fast: false
diff --git a/shapes-demo-ros2.repos b/shapes-demo-ros2.repos
index 119e091..f52d4b5 100644
--- a/shapes-demo-ros2.repos
+++ b/shapes-demo-ros2.repos
@@ -10,7 +10,7 @@ repositories:
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git
-        version: 3.3.x
+        version: 3.4.x
     shapes-demo-typesupport:
         type: git
         url: https://github.com/eProsima/ShapesDemo-TypeSupport.git
@@ -18,4 +18,4 @@ repositories:
     shapes-demo:
         type: git
         url: https://github.com/eProsima/ShapesDemo.git
-        version: 3.3.x
+        version: 3.4.x
diff --git a/shapes-demo.repos b/shapes-demo.repos
index a2063e3..e09e442 100644
--- a/shapes-demo.repos
+++ b/shapes-demo.repos
@@ -10,8 +10,8 @@ repositories:
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git
-        version: 3.3.x
+        version: 3.4.x
     shapes-demo:
         type: git
         url: https://github.com/eProsima/ShapesDemo.git
-        version: 3.3.x
+        version: 3.4.x
diff --git a/version.pri b/version.pri
index b894256..c436730 100644
--- a/version.pri
+++ b/version.pri
@@ -1 +1 @@
-SHAPESVERSION="3.3.0"
+SHAPESVERSION="3.4.0"