diff --git a/.circleci/config.yml b/.circleci/config.yml
index 92575c22..91cc887b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,7 +8,7 @@ references:
 
   node18: &node18
     docker:
-      - image: cimg/node:18.0
+      - image: cimg/node:18.11
   nodelts: &nodelts
     docker:
       - image: cimg/node:lts
diff --git a/packages/core/package.json b/packages/core/package.json
index 8c3fdda2..e0a1eae9 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -18,7 +18,7 @@
 	"types": "./dist/esm/index.d.ts",
 	"type": "module",
 	"engines": {
-		"node": ">=18.0.0"
+		"node": ">=18.11.0"
 	},
 	"dependencies": {
 		"@types/glob-to-regexp": "^0.4.4",
diff --git a/packages/core/src/Router.ts b/packages/core/src/Router.ts
index 54489158..be3af6c9 100644
--- a/packages/core/src/Router.ts
+++ b/packages/core/src/Router.ts
@@ -273,8 +273,8 @@ export default class Router {
 				if (typeof response[name] === 'function') {
 					//@ts-expect-error TODO probably make use of generics here
 					return new Proxy(response[name], {
-						apply: (matcherFunction, thisArg, args) => {
-							const result = matcherFunction.apply(response, args);
+						apply: (func, thisArg, args) => {
+							const result = func.apply(response, args);
 							if (result.then) {
 								pendingPromises.push(
 									//@ts-expect-error TODO probably make use of generics here
diff --git a/packages/vitest/package.json b/packages/vitest/package.json
index 1a8af1f5..b15eaeef 100644
--- a/packages/vitest/package.json
+++ b/packages/vitest/package.json
@@ -13,7 +13,7 @@
 	"types": "./types/index.d.ts",
 	"type": "module",
 	"engines": {
-		"node": ">=18.0.0"
+		"node": ">=18.11.0"
 	},
 	"dependencies": {
 		"@fetch-mock/core": "^0.6.3"