diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index bead854..9933478 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - run: npm install uglify-es
-    - run: npx uglify-es fullscreen-card.js -b beautify=false,max_line_len=150 --compress --mangle toplevel --output fullscreen-card.js
+    - run: npx uglify-es fullscreen-card.js -b beautify=false,max_line_len=150 --compress --output fullscreen-card.js
     - name: Upload release asset
       uses: actions/upload-release-asset@v1
       env: