diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index f7047aaf..80d66d8a 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -24,7 +24,7 @@ jobs:
         run: |
           pip3 install setuptools
           pip3 install recommonmark
-          pip3 install sphinx sphinx-rtd-theme
+          pip3 install sphinx sphinx-rtd-theme==2.0.0
           pip3 install sphinx_markdown_tables
 
       - name: "Build Sphinx Doc"
@@ -36,4 +36,4 @@ jobs:
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH: gh-pages
-          FOLDER: build/html/
\ No newline at end of file
+          FOLDER: build/html/