diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e9f91b7d..896afd9f 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -20,3 +20,9 @@ jobs:
       env:
         PYTHONPATH: ${{github.workspace}}/ros_buildfarm
       run: ${{github.workspace}}/ros_buildfarm/scripts/misc/validate_config_index.py file://${{github.workspace}}/index.yaml
+  yamllint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Validate YAML style
+      run: yamllint .
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 00000000..79e21f13
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,7 @@
+---
+extends: default
+
+rules:
+  indentation:
+    indent-sequences: false
+  line-length: disable