diff --git a/.github/workflows/build-debug.yaml b/.github/workflows/build-debug.yaml
index 0422c13..93d934a 100644
--- a/.github/workflows/build-debug.yaml
+++ b/.github/workflows/build-debug.yaml
@@ -19,7 +19,7 @@ jobs:
       - uses: Cysharp/Actions/.github/actions/setup-dotnet@main
       - run: dotnet build -c Release
       - run: dotnet test -c Release
-      - run: dotnet pack -c Release --no-build -p:IncludeSymbols=true -o $GITHUB_WORKSPACE/artifacts
+      - run: dotnet pack -c Release --no-build -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg -o $GITHUB_WORKSPACE/artifacts
 
   build-unity:
     if: ${{ ((github.event_name == 'push' && github.repository_owner == 'Cysharp') || startsWith(github.event.pull_request.head.label, 'Cysharp:')) && github.triggering_actor != 'dependabot[bot]' }}
diff --git a/.github/workflows/build-release.yaml b/.github/workflows/build-release.yaml
index cab7087..a3064fe 100644
--- a/.github/workflows/build-release.yaml
+++ b/.github/workflows/build-release.yaml
@@ -39,7 +39,7 @@ jobs:
       # build and pack
       - run: dotnet build -c Release -p:Version=${{ inputs.tag }}
       - run: dotnet test -c Release --no-build
-      - run: dotnet pack ./src/UniTask.NetCore/UniTask.NetCore.csproj -c Release --no-build -p:Version=${{ inputs.tag }} -o ./publish
+      - run: dotnet pack ./src/UniTask.NetCore/UniTask.NetCore.csproj -c Release --no-build -p:Version=${{ inputs.tag }} -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg -o ./publish
       # Store artifacts.
       - uses: Cysharp/Actions/.github/actions/upload-artifact@main
         with: