diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 5b1df62..2fe397c 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install Poetry
-        run: pipx install poetry==$POETRY_VERSION
+        run: pipx install poetry==${{ env.POETRY_VERSION }}
 
       - name: Set up Python with Poetry cache
         uses: actions/setup-python@v4