diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1f274bca..b27566cd 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -239,8 +239,8 @@ importers:
         specifier: ^4.7.0
         version: 4.7.0
       p-defer:
-        specifier: ~3.0.0
-        version: 3.0.0
+        specifier: ~4.0.1
+        version: 4.0.1
       qunit:
         specifier: ^2.20.0
         version: 2.20.0
@@ -6078,6 +6078,10 @@ packages:
     resolution: {integrity: sha512-ugZxsxmtTln604yeYd29EGrNhazN2lywetzpKhfmQjW/VJmhpDmWbiX+h0zL8V91R0UXkhb3KtPmyq9PZw3aYw==}
     engines: {node: '>=8'}
 
+  p-defer@4.0.1:
+    resolution: {integrity: sha512-Mr5KC5efvAK5VUptYEIopP1bakB85k2IWXaRC0rsh1uwn1L6M0LVml8OIQ4Gudg4oyZakf7FmeRLkMMtZW1i5A==}
+    engines: {node: '>=12'}
+
   p-finally@1.0.0:
     resolution: {integrity: sha512-LICb2p9CB7FS+0eR1oqWnHhp0FljGLZCWBE9aix0Uye9W8LTQPwMTYVGWQWIw9RdQiDg4+epXQODwIYJtSJaow==}
     engines: {node: '>=4'}
@@ -15355,6 +15359,8 @@ snapshots:
 
   p-defer@3.0.0: {}
 
+  p-defer@4.0.1: {}
+
   p-finally@1.0.0: {}
 
   p-finally@2.0.1: {}
diff --git a/test-app/package.json b/test-app/package.json
index be303c90..0d64be23 100644
--- a/test-app/package.json
+++ b/test-app/package.json
@@ -75,7 +75,7 @@
     "eslint-plugin-ember": "^12.0.0",
     "eslint-plugin-qunit": "^8.0.1",
     "loader.js": "^4.7.0",
-    "p-defer": "~3.0.0",
+    "p-defer": "~4.0.1",
     "qunit": "^2.20.0",
     "qunit-dom": "^3.0.0",
     "sinon": "^17.0.1",