diff --git a/test-app/package.json b/test-app/package.json
index ce6fb78..f65e1d1 100644
--- a/test-app/package.json
+++ b/test-app/package.json
@@ -63,7 +63,7 @@
     "@types/ember__test": "^4.0.6",
     "@types/ember__utils": "^4.0.7",
     "@types/qunit": "^2.19.10",
-    "@types/rsvp": "^4.0.6",
+    "@types/rsvp": "^4.0.9",
     "@typescript-eslint/eslint-plugin": "^7.9.0",
     "@typescript-eslint/parser": "^7.18.0",
     "broccoli-asset-rev": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index 12e4c45..69230ba 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2502,10 +2502,10 @@
     "@types/glob" "*"
     "@types/node" "*"
 
-"@types/rsvp@*", "@types/rsvp@^4.0.6":
-  version "4.0.8"
-  resolved "https://registry.yarnpkg.com/@types/rsvp/-/rsvp-4.0.8.tgz#79fb4525d7e4c22322bbbee2648fcbf2d6bbb2f8"
-  integrity sha512-OraQXMlBrD3nll0VuEKENY3IoR4N3eDIqElVWo5dSheMveYYMDSIUMbtcI7wOGWyUilLwfaOx9VF8U8LdrHXkg==
+"@types/rsvp@*", "@types/rsvp@^4.0.9":
+  version "4.0.9"
+  resolved "https://registry.yarnpkg.com/@types/rsvp/-/rsvp-4.0.9.tgz#7d9d07c1a2fa82c808eca37757cc6a20272a4b66"
+  integrity sha512-F6vaN5mbxw2MBCu/AD9fSKwrhnto2pE77dyUsi415qz9IP9ni9ZOWXHxnXfsM4NW9UjW+it189jvvqnhv37Z7Q==
 
 "@types/send@*":
   version "0.17.4"