diff --git a/packages/router/package.json b/packages/router/package.json
index 132348bdd..0ae2fc896 100644
--- a/packages/router/package.json
+++ b/packages/router/package.json
@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
-    "@ember/string": "^1.0.0",
+    "@ember/string": "^3.0.0",
     "@ember/test-helpers": "^2.4.2",
     "@embroider/compat": "0.47.2",
     "@embroider/core": "0.47.2",