diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 9456158..01bfedd 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -66,6 +66,40 @@ jobs:
           name: sphgeom-sdist
           path: dist/*
 
+  check-changes:
+    outputs:
+      skip: ${{ steps.check.outputs.skip }}
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Check if weekly changed
+        id: check
+        run: |
+          # Get SHA hashes for all weekly tags
+          weekly_sha=$(git tag -l 'w.*' | while read tag; do
+            git rev-list -n 1 "${tag}"
+          done)
+
+          # Extract the current tag and its SHA
+          current_tag=${GITHUB_REF#refs/tags/}
+          current_sha=$(git rev-list -1 "${current_tag}")
+
+          # Count occurrences of the current SHA in the weekly SHA list
+          n=$(echo "${weekly_sha}" | grep -c "${current_sha}")
+          echo "Current tag ${current_tag} (${current_sha}) SHA found ${n} time(s)"
+
+          # Determine whether to skip the upload based on the count
+          if [ "${n}" -gt 1 ]; then
+            echo "Skip upload"
+            echo "skip=true" >> "${GITHUB_ENV}"
+          else
+            echo "Enable upload"
+            echo "skip=false" >> "${GITHUB_ENV}"
+          fi
+
   pypi_wheel_build:
     strategy:
       matrix:
@@ -111,7 +145,8 @@ jobs:
           path: dist/*
 
   pipy_upload:
-    needs: [pypi_sdist_build, pypi_wheel_build]
+    needs: [pypi_sdist_build, pypi_wheel_build, check-changes]
+    if: "!startsWith(github.ref, 'refs/tags/w.') || needs.check-changes.outputs.skip == 'false'"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/download-artifact@v4