diff --git a/.github/workflows/mkdocs.yml b/.github/workflows/mkdocs.yml
index fb467be1..fd3445aa 100644
--- a/.github/workflows/mkdocs.yml
+++ b/.github/workflows/mkdocs.yml
@@ -18,6 +18,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install mkdocs
         pip install mkdocs-material
+        pip install pygments
     - name: Build doc
       run: |
         git pull
diff --git a/mkdocs.yml b/mkdocs.yml
index 98571acf..6adf65fc 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -2,5 +2,4 @@ site_name: IXWebSocket
 theme:
   name: 'material'
 markdown_extensions:
-  - fenced_code
-  - tables
+  - codehilite