diff --git a/package-overrides/github/angular-ui/ui-router@0.2.12.json b/package-overrides/github/angular-ui/ui-router@0.2.12.json
index 6720f3f..ef6673d 100644
--- a/package-overrides/github/angular-ui/ui-router@0.2.12.json
+++ b/package-overrides/github/angular-ui/ui-router@0.2.12.json
@@ -2,6 +2,7 @@
   "directories": {
     "lib": "release"
   },
+  "format": "cjs",
   "main": "angular-ui-router",
   "shim": {
     "angular-ui-router": {