diff --git a/liquid-fire/package.json b/liquid-fire/package.json
index 0fd7970a..0c623c1e 100644
--- a/liquid-fire/package.json
+++ b/liquid-fire/package.json
@@ -103,7 +103,6 @@
     "extends": "../package.json"
   },
   "peerDependencies": {
-    "@ember/string": "^3.1.1",
     "ember-source": ">= 4.0.0",
     "velocity-animate": "^1.5.2"
   }
diff --git a/liquid-fire/src/-private/string.js b/liquid-fire/src/-private/string.js
new file mode 100644
index 00000000..808fb778
--- /dev/null
+++ b/liquid-fire/src/-private/string.js
@@ -0,0 +1,5 @@
+const CAPITALIZE_REGEX = /(^|\/)([a-z\u00C0-\u024F])/g;
+
+export function capitalize(str) {
+  return str.replace(CAPITALIZE_REGEX, (match) => match.toUpperCase());
+}
diff --git a/liquid-fire/src/running-transition.js b/liquid-fire/src/running-transition.js
index 38ab6507..b9ab6f29 100644
--- a/liquid-fire/src/running-transition.js
+++ b/liquid-fire/src/running-transition.js
@@ -1,4 +1,4 @@
-import { capitalize } from '@ember/string';
+import { capitalize } from './-private/string';
 
 export default class RunningTransition {
   constructor(transitionMap, versions, animation) {
diff --git a/liquid-fire/src/utils/animate.js b/liquid-fire/src/utils/animate.js
index d4a6eacf..bc5996c9 100644
--- a/liquid-fire/src/utils/animate.js
+++ b/liquid-fire/src/utils/animate.js
@@ -1,5 +1,5 @@
-import { capitalize } from '@ember/string';
 import { Velocity } from '../index';
+import { capitalize } from '../-private/string';
 
 export function measure($elt) {
   const boundingRect = $elt.getBoundingClientRect();
diff --git a/package.json b/package.json
index b253b555..86703ae0 100644
--- a/package.json
+++ b/package.json
@@ -31,4 +31,4 @@
   "engines": {
     "node": "16.* || >= 18"
   }
-}
\ No newline at end of file
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e05beb04..3ba2fb3c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -213,9 +213,6 @@ importers:
       '@ember/render-modifiers':
         specifier: ^2.1.0
         version: 2.1.0(@babel/core@7.22.9)(ember-source@4.12.0)
-      '@ember/string':
-        specifier: ^3.1.1
-        version: 3.1.1
       '@embroider/addon-shim':
         specifier: ^1.8.6
         version: 1.8.6
@@ -2041,6 +2038,7 @@ packages:
       ember-cli-babel: 7.26.11
     transitivePeerDependencies:
       - supports-color
+    dev: true
 
   /@ember/test-helpers@3.2.0(ember-source@4.12.0)(webpack@5.88.2):
     resolution: {integrity: sha512-3yWpPsK5O77tUdCwW3HayrAcdlRitIRYMvLIG69Pkal1JMIGdNYVTvJ2R1lenhQh2syd/WFmGM07vQuDAtotQw==}