diff --git a/package.json b/package.json
index 28d12e5..885e76e 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@babel/core": "~7.26.0",
     "@babel/eslint-parser": "~7.25.1",
     "@ember/optional-features": "~2.2.0",
-    "@ember/string": "^3.1.1",
+    "@ember/string": "^4.0.1",
     "@ember/test-helpers": "~2.9.3",
     "@embroider/test-setup": "~1.8.3",
     "@glimmer/component": "~1.1.2",
diff --git a/yarn.lock b/yarn.lock
index b8898f3..8463624 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1478,12 +1478,10 @@
     ember-compatibility-helpers "^1.2.5"
     ember-modifier-manager-polyfill "^1.2.0"
 
-"@ember/string@^3.1.1":
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/@ember/string/-/string-3.1.1.tgz#0a5ac0d1e4925259e41d5c8d55ef616117d47ff0"
-  integrity sha512-UbXJ+k3QOrYN4SRPHgXCqYIJ+yWWUg1+vr0H4DhdQPTy8LJfyqwZ2tc5uqpSSnEXE+/1KopHBE5J8GDagAg5cg==
-  dependencies:
-    ember-cli-babel "^7.26.6"
+"@ember/string@^4.0.1":
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/@ember/string/-/string-4.0.1.tgz#2c9d3f749bad92567e99ab5b8d4fdb5ed7f0ff0c"
+  integrity sha512-VWeng8BSWrIsdPfffOQt/bKwNKJL7+37gPFh/6iZZ9bke+S83kKqkS30poo4bTGfRcMnvAE0ie7txom+iDu81Q==
 
 "@ember/test-helpers@~2.9.3":
   version "2.9.3"