diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..2b77559
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,12 @@
+on: [push]
+
+jobs:
+  validate_mapcss_job:
+    runs-on: ubuntu-latest
+    name: Validate mapcss files
+    steps:
+      - name: Validate MapCSS files
+        id: josm-validate
+        uses: KaartGroup/JOSMValidateAction@HEAD
+        with:
+          files_to_validate: 'Kaart_QC_Quandary.mapcss'