diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 37670a81..c7244ff7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -201,6 +201,13 @@ jobs:
 
       - run: pip install -U twine
 
+      - name: build sdist
+        if: ${{ matrix.os == 'ubuntu' && matrix.target == 'x86_64' && matrix.manylinux == 'auto' }}
+        uses: messense/maturin-action@v1
+        with:
+          command: sdist
+          args: --out dist
+
       - name: build wheels
         uses: messense/maturin-action@v1
         with: