diff --git a/extension/package.json b/extension/package.json
index e4a4c2e8..18da20f1 100644
--- a/extension/package.json
+++ b/extension/package.json
@@ -80,6 +80,7 @@
     "raw-loader": "^4.0.2",
     "react-transform-catch-errors": "^1.0.2",
     "react-transform-hmr": "^1.0.4",
+    "rimraf": "^3.0.2",
     "selenium-webdriver": "^3.6.0",
     "sinon-chrome": "^3.0.1",
     "style-loader": "^3.2.1",
diff --git a/yarn.lock b/yarn.lock
index d75b2a52..3d1c48c4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -25627,6 +25627,7 @@ fsevents@^1.2.7:
     react-transform-hmr: ^1.0.4
     redux: ^4.1.1
     redux-persist: ^6.0.0
+    rimraf: ^3.0.2
     selenium-webdriver: ^3.6.0
     sinon-chrome: ^3.0.1
     style-loader: ^3.2.1