diff --git a/packages/extension/package.json b/packages/extension/package.json
index 293a4f5c..c871d5c0 100644
--- a/packages/extension/package.json
+++ b/packages/extension/package.json
@@ -14,7 +14,7 @@
     "@types/firefox-webext-browser": "^67.0.1",
     "extensionizer": "^1.0.1",
     "extract-loader": "^3.1.0",
-    "file-loader": "^3.0.1",
+    "file-loader": "^4.0.0",
     "html-loader": "^0.5.5",
     "webpack-extension-manifest-plugin": "^0.4.3"
   }