diff --git a/.github/workflows/build-rti.yml b/.github/workflows/build-rti.yml
index 2561b7da0..ab6beeac2 100644
--- a/.github/workflows/build-rti.yml
+++ b/.github/workflows/build-rti.yml
@@ -7,7 +7,7 @@ jobs:
   native-build:
     strategy:
       matrix:
-        platform: [ubuntu-latest, macos-latest, windows-latest]
+        platform: [ubuntu-24.04, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
 
     steps:
@@ -19,7 +19,7 @@ jobs:
         run: .github/scripts/build-rti.sh -DAUTH=ON
 
   docker-build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Check out reactor-c repository
         uses: actions/checkout@v4
diff --git a/.github/workflows/build-trace-tools.yml b/.github/workflows/build-trace-tools.yml
index 955c0c908..104f6c9e0 100644
--- a/.github/workflows/build-trace-tools.yml
+++ b/.github/workflows/build-trace-tools.yml
@@ -7,7 +7,7 @@ jobs:
   run:
     strategy:
       matrix:
-        platform: [ubuntu-latest, macos-latest, windows-latest]
+        platform: [ubuntu-24.04, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
 
     steps:
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 1ced71f16..c6f98030f 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -11,7 +11,7 @@ jobs:
   run:
     strategy:
       matrix:
-        platform: [ubuntu-latest, macos-latest]
+        platform: [ubuntu-24.04, macos-latest]
     runs-on: ${{ matrix.platform }}
 
     steps:
diff --git a/lingua-franca-ref.txt b/lingua-franca-ref.txt
index 8b25206ff..d0395e498 100644
--- a/lingua-franca-ref.txt
+++ b/lingua-franca-ref.txt
@@ -1 +1 @@
-master
\ No newline at end of file
+ubuntu-24.04
\ No newline at end of file