diff --git a/.github/workflows/mulle-sde-artifacts.yml b/.github/workflows/mulle-sde-artifacts.yml
index ebbb5af..1c6e88c 100644
--- a/.github/workflows/mulle-sde-artifacts.yml
+++ b/.github/workflows/mulle-sde-artifacts.yml
@@ -25,7 +25,7 @@ jobs:
 
     - uses: mulle-sde/github-ci@v2
 
-    - uses: mulle-cc/github-ci@v4
+    - uses: mulle-cc/github-ci@v5
 
     - name: Choose musl on Linux
       run: |
diff --git a/.github/workflows/mulle-sde-ci.yml b/.github/workflows/mulle-sde-ci.yml
index 745aab1..4352d20 100644
--- a/.github/workflows/mulle-sde-ci.yml
+++ b/.github/workflows/mulle-sde-ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest] # macos-latest,
+        os: [ ubuntu-24.04 ] # macos-latest,
 
     steps:
     - name: Set MULLE_HOSTNAME
@@ -37,7 +37,7 @@ jobs:
 
     - uses: mulle-sde/github-ci@v2
 
-    - uses: mulle-cc/github-ci@v4
+    - uses: mulle-cc/github-ci@v5
 
     - name: Dump Project Environment
       run:  |