diff --git a/package.json b/package.json
index 610b972..bdc4c7a 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "standard-version": "^9.3.2"
   },
   "dependencies": {
-    "@krakenjs/cross-domain-utils": "^3.0.2"
+    "@krakenjs/cross-domain-utils": "^v4.0.0-typescript.2"
   },
   "lint-staged": {
     "*": "prettier --write --ignore-unknown"
diff --git a/src/weakmap.js b/src/weakmap.js
index 86c3606..012ee87 100644
--- a/src/weakmap.js
+++ b/src/weakmap.js
@@ -1,6 +1,9 @@
 /* @flow */
 
-import { isWindow, isWindowClosed } from "@krakenjs/cross-domain-utils/src";
+import {
+  isWindow,
+  isWindowClosed,
+} from "@krakenjs/cross-domain-utils/dist/esm";
 
 import { hasNativeWeakMap } from "./native";
 import { noop, safeIndexOf } from "./util";