diff --git a/.github/workflows/ci-ros-lint.yaml b/.github/workflows/ci-ros-lint.yaml
index d3c094e9..6e1a0660 100644
--- a/.github/workflows/ci-ros-lint.yaml
+++ b/.github/workflows/ci-ros-lint.yaml
@@ -5,7 +5,7 @@ on:
 jobs:
   ament_lint:
     name: ament_${{ matrix.linter }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
@@ -15,7 +15,7 @@ jobs:
     - uses: ros-tooling/setup-ros@v0.2
     - uses: ros-tooling/action-ros-lint@v0.1
       with:
-        distribution: humble
+        distribution: galactic
         linter: ${{ matrix.linter }}
         package-name:
           smacc2