diff --git a/.github/workflows/gh-pages.yaml b/.github/workflows/gh-pages.yaml
index 1915ae0d0b..a66ddf2905 100644
--- a/.github/workflows/gh-pages.yaml
+++ b/.github/workflows/gh-pages.yaml
@@ -16,7 +16,7 @@ jobs:
           python-version: 3.x
       - name: build
         run: |
-          pip install mkdocs mkdocs_material
+          pip install mkdocs==1.0.4 mkdocs_material==4.1.1
           mkdocs build
           mkdir ./site/.circleci && echo '{version: 2, jobs: {build: {branches: {ignore: gh-pages}}}}' > ./site/.circleci/config.yml
       - name: deploy