diff --git a/src/manifest.json b/src/manifest.json
index 8c4d21a8..60be3cd8 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -34,6 +34,7 @@
             "match_about_blank": true
         }
     ],
+    "content_security_policy": "script-src 'unsafe-eval' 'self'; object-src 'self'",
     "web_accessible_resources": [
         "static/commandline.html",
         "static/defaultFavicon"