diff --git a/package.json b/package.json
index 6ed78b8..9057a26 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@babel/eslint-parser": "^7.22.15",
     "@babel/plugin-proposal-decorators": "^7.23.2",
     "@ember/optional-features": "^2.0.0",
-    "@ember/string": "^3.1.1",
+    "@ember/string": "^4.0.0",
     "@ember/test-helpers": "^3.2.0",
     "@embroider/test-setup": "^3.0.2",
     "@glimmer/component": "^1.1.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index afa40da..ab570f8 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -32,8 +32,8 @@ devDependencies:
     specifier: ^2.0.0
     version: 2.0.0
   '@ember/string':
-    specifier: ^3.1.1
-    version: 3.1.1
+    specifier: ^4.0.0
+    version: 4.0.0
   '@ember/test-helpers':
     specifier: ^3.2.0
     version: 3.3.0(ember-source@5.4.1)(webpack@5.90.2)
@@ -1460,13 +1460,8 @@ 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@3.3.0(ember-source@5.4.1)(webpack@5.90.2):
@@ -2557,9 +2552,6 @@ packages:
 
   /ajv-formats@2.1.1:
     resolution: {integrity: sha512-Wx0Kx52hxE7C18hkMEggYlEifqWZtYaRgouJor+WMdPnQyEK13vgEWyVNup7SoeeoLMsr4kf5h6dOW11I15MUA==}
-    peerDependenciesMeta:
-      ajv:
-        optional: true
     dependencies:
       ajv: 8.12.0