diff --git a/addons/toolbars/package.json b/addons/toolbars/package.json
index 0bceeec4f09..725cc2d5f31 100644
--- a/addons/toolbars/package.json
+++ b/addons/toolbars/package.json
@@ -33,10 +33,12 @@
     "@storybook/addons": "6.0.0-beta.0",
     "@storybook/api": "6.0.0-beta.0",
     "@storybook/client-api": "6.0.0-beta.0",
-    "@storybook/components": "6.0.0-beta.0"
+    "@storybook/components": "6.0.0-beta.0",
+    "core-js": "^3.0.1"
   },
   "peerDependencies": {
-    "react": "*"
+    "react": "*",
+    "react-dom": "*"
   },
   "publishConfig": {
     "access": "public"