diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 28079d0..d630e32 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,3 +15,7 @@ jobs:
     - uses: actions/checkout@v2
     - name: Link Checker
       uses: peter-evans/link-checker@v1.2.2
+    - name: HTML5 Validator
+      uses: Cyb3r-Jak3/html5validator-action@v0.4.3
+      with:
+        root: /