diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index cfab87c..f68cd11 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -26,7 +26,7 @@ jobs:
         run: |
           echo "Running validation"
           yamllint -d "{extends: default, ignore: [.github/, ./vyos/]}" \
-                   -d "{rules: {truthy: {allowed-values: [true, false, yes, no]}}}" .
+                   -d "{rules: {truthy: {allowed-values: ["true", "false", "yes", "no"]}}}" .
       - name: Run validation
         env:
           VYOS_PASSWORD: ${{secrets.VYOS_PASSWORD}}