diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 279fe14..dfcaa52 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,6 +90,11 @@ jobs:
             ${{ runner.os }}-go-${{ matrix.golang }}-
       - name: Run tests on Unix-like operating systems
         run: make unittest
+      - name: Check go.mod
+        run: |
+          go mod tidy -v
+          git --no-pager diff go.mod go.sum
+          git --no-pager diff --quiet go.mod go.sum
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v1
         with: