diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 14fc857..8b59806 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,7 @@ jobs:
         os:
           - ubuntu-latest
         node_version:
+          - 18
           - 20
           - 22
     name: Node ${{ matrix.node_version }} on ${{ matrix.os }}
diff --git a/lib/router.js b/lib/router.js
index 748520b..a806b85 100644
--- a/lib/router.js
+++ b/lib/router.js
@@ -5,10 +5,12 @@
  * @link https://github.com/alexmingoia/koa-router
  */
 const http = require('node:http');
+const util = require('node:util');
+
+const debug = util.debuglog('koa-router');
 
 const compose = require('koa-compose');
 const HttpError = require('http-errors');
-const debug = require('debug')('koa-router');
 const { pathToRegexp } = require('path-to-regexp');
 
 const Layer = require('./layer');
diff --git a/package.json b/package.json
index 17e494c..ca0ce2b 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,6 @@
     }
   ],
   "dependencies": {
-    "debug": "^4.3.6",
     "http-errors": "^2.0.0",
     "koa-compose": "^4.1.0",
     "path-to-regexp": "^6.2.2"
@@ -45,7 +44,7 @@
     "xo": "0.53.1"
   },
   "engines": {
-    "node": ">= 20"
+    "node": ">= 18"
   },
   "files": [
     "lib"