diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 2902724..0196ca4 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -56,6 +56,7 @@ jobs:
         pip install poetry
     - name: Test
       run: |
+        poetry install
         poetry run nai-test-api
       env:
         NAI_USERNAME: ${{ secrets.NAI_USERNAME }}
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 8060621..c571aa0 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -16,7 +16,9 @@ jobs:
 
     - run: pip install poetry
     - name: Build HTML
-      run: poetry run nai-build-docs
+      run: |
+        poetry install
+        poetry run nai-build-docs
 
     - name: Deploy on Github Pages
       uses: peaceiris/actions-gh-pages@v3