diff --git a/package.json b/package.json
index 54478382..5c82dd8b 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "devDependencies": {
     "@babel/eslint-parser": "7.24.8",
     "@ember/optional-features": "2.1.0",
-    "@ember/string": "3.1.1",
+    "@ember/string": "4.0.0",
     "@ember/test-helpers": "3.3.1",
     "@embroider/test-setup": "3.0.3",
     "@glimmer/component": "1.1.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b972d838..58af5743 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -17,8 +17,8 @@ devDependencies:
     specifier: 2.1.0
     version: 2.1.0
   '@ember/string':
-    specifier: 3.1.1
-    version: 3.1.1
+    specifier: 4.0.0
+    version: 4.0.0
   '@ember/test-helpers':
     specifier: 3.3.1
     version: 3.3.1(@babel/core@7.24.9)(ember-source@5.10.1)(webpack@5.93.0)
@@ -1468,13 +1468,8 @@ packages:
       - supports-color
     dev: true
 
-  /@ember/string@3.1.1:
-    resolution: {integrity: sha512-UbXJ+k3QOrYN4SRPHgXCqYIJ+yWWUg1+vr0H4DhdQPTy8LJfyqwZ2tc5uqpSSnEXE+/1KopHBE5J8GDagAg5cg==}
-    engines: {node: 12.* || 14.* || >= 16}
-    dependencies:
-      ember-cli-babel: 7.26.11
-    transitivePeerDependencies:
-      - supports-color
+  /@ember/string@4.0.0:
+    resolution: {integrity: sha512-IMVyVE72twuAMSYcHzWSgtgYTtzlHlKSGW8vEbztnnmkU6uo7kVHmiqSN9R4RkBhzvh0VD4G76Eph+55t3iNIA==}
     dev: true
 
   /@ember/test-helpers@3.3.1(@babel/core@7.24.9)(ember-source@5.10.1)(webpack@5.93.0):