diff --git a/.github/workflows/plugin-release.yaml b/.github/workflows/plugin-release.yaml
index eba33be..0a0f15d 100644
--- a/.github/workflows/plugin-release.yaml
+++ b/.github/workflows/plugin-release.yaml
@@ -205,6 +205,19 @@ jobs:
           tar -tzf "${{ env.TARBALL }}" | head -20
           tar -tzf "${{ env.TARBALL }}" | grep -q "main.js" || { echo "Error: main.js not found in tarball"; exit 1; }
 
+      - name: Rebuild tarball
+        run: |
+          rm -f "${{ env.TARBALL }}"
+          npx @kinvolk/headlamp-plugin package
+          for f in *.tar.gz; do
+            [ "$f" != "${{ env.TARBALL }}" ] && mv "$f" "${{ env.TARBALL }}"
+          done
+
+      - name: Validate rebuilt tarball
+        run: |
+          tar -tzf "${{ env.TARBALL }}" | grep -q "main.js" || \
+            { echo "Error: main.js not found after rebuild"; exit 1; }
+
       - name: Compute checksum
         run: |
           CHECKSUM=$(sha256sum "${{ env.TARBALL }}" | awk '{print $1}')