diff --git a/.github/workflows/build_docs.yml b/.github/workflows/build_docs.yml
index a929f15..41014c6 100644
--- a/.github/workflows/build_docs.yml
+++ b/.github/workflows/build_docs.yml
@@ -41,4 +41,4 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ${PUBLISH_DIR}
\ No newline at end of file
+          publish_dir: ${{ env.PUBLISH_DIR }}
\ No newline at end of file