diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index e6cab9b..7ad0832 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -19,7 +19,9 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
     - name: Build a source tarball
-      run: python3 setup.py sdist
+      run: |
+        python3 -m pip install numpy
+        python3 setup.py sdist
     - name: Store the distribution packages
       uses: actions/upload-artifact@v3
       with: