diff --git a/package-lock.json b/package-lock.json
index 5754556..eca009d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,10 +9,9 @@
       "version": "2.4.4",
       "license": "MIT",
       "dependencies": {
-        "@koa/router": "^14.0.0",
+        "@koa/router": "^15.1.1",
         "@koa/send": "^6.0.0",
         "@types/koa": "^3.0.0",
-        "@types/koa__router": "^12.0.4",
         "@types/stack-trace": "^0.0.33",
         "@types/supertest": "^6.0.3",
         "dotenv": "^17.2.3",
@@ -873,19 +872,26 @@
       }
     },
     "node_modules/@koa/router": {
-      "version": "14.0.0",
-      "resolved": "https://registry.npmjs.org/@koa/router/-/router-14.0.0.tgz",
-      "integrity": "sha512-LBSu5K0qAaaQcXX/0WIB9PGDevyCxxpnc1uq13vV/CgObaVxuis5hKl3Eboq/8gcb6ebnkAStW9NB/Em2eYyFA==",
-      "deprecated": "Please upgrade to v15 or higher. All reported bugs in this version are fixed in newer releases, dependencies have been updated, and security has been improved.",
+      "version": "15.1.1",
+      "resolved": "https://registry.npmjs.org/@koa/router/-/router-15.1.1.tgz",
+      "integrity": "sha512-trYxL4VOx8r92f8luqpN83xkN0DMTsp/HBJIxoDZH/a2I1Hxvoe+jjjhyJRQUQIHmsNQjCM+Xj6nCqSvnDnlCw==",
       "license": "MIT",
       "dependencies": {
-        "debug": "^4.4.1",
-        "http-errors": "^2.0.0",
+        "debug": "^4.4.3",
+        "http-errors": "^2.0.1",
         "koa-compose": "^4.1.0",
-        "path-to-regexp": "^8.2.0"
+        "path-to-regexp": "^8.3.0"
       },
       "engines": {
         "node": ">= 20"
+      },
+      "peerDependencies": {
+        "koa": "^2.0.0 || ^3.0.0"
+      },
+      "peerDependenciesMeta": {
+        "koa": {
+          "optional": false
+        }
       }
     },
     "node_modules/@koa/send": {
@@ -1506,15 +1512,6 @@
         "@types/node": "*"
       }
     },
-    "node_modules/@types/koa__router": {
-      "version": "12.0.5",
-      "resolved": "https://registry.npmjs.org/@types/koa__router/-/koa__router-12.0.5.tgz",
-      "integrity": "sha512-1HeLxuDn4n5it1yZYCSyOYXo++73zT0ffoviXnPxbwbxLbvDFEvWD9ZzpRiIpK4oKR0pi+K+Mk/ZjyROjW3HSw==",
-      "license": "MIT",
-      "dependencies": {
-        "@types/koa": "*"
-      }
-    },
     "node_modules/@types/koa-compose": {
       "version": "3.2.9",
       "resolved": "https://registry.npmjs.org/@types/koa-compose/-/koa-compose-3.2.9.tgz",
@@ -5044,6 +5041,7 @@
       "resolved": "https://registry.npmjs.org/koa/-/koa-3.1.1.tgz",
       "integrity": "sha512-KDDuvpfqSK0ZKEO2gCPedNjl5wYpfj+HNiuVRlbhd1A88S3M0ySkdf2V/EJ4NWt5dwh5PXCdcenrKK2IQJAxsg==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "accepts": "^1.3.8",
         "content-disposition": "~0.5.4",
diff --git a/package.json b/package.json
index 96da5c5..c3b7f97 100644
--- a/package.json
+++ b/package.json
@@ -42,10 +42,9 @@
     "format:check": "prettier --check ."
   },
   "dependencies": {
-    "@koa/router": "^14.0.0",
+    "@koa/router": "^15.1.1",
     "@koa/send": "^6.0.0",
     "@types/koa": "^3.0.0",
-    "@types/koa__router": "^12.0.4",
     "@types/stack-trace": "^0.0.33",
     "@types/supertest": "^6.0.3",
     "dotenv": "^17.2.3",
diff --git a/src/Application/ApplicationFactory.ts b/src/Application/ApplicationFactory.ts
index e69c7b2..4829c1e 100644
--- a/src/Application/ApplicationFactory.ts
+++ b/src/Application/ApplicationFactory.ts
@@ -1,4 +1,4 @@
-import Router from '@koa/router';
+import Router, { type RouterInstance } from '@koa/router';
 import Koa, { type DefaultContext, type DefaultState, type Middleware } from 'koa';
 import { koaBody } from 'koa-body';
 import { type Application } from './types';
@@ -34,7 +34,7 @@ export function create(config: KoalaConfig): Application {
   return app;
 }
 
-function createRouter(): Router {
+function createRouter(): RouterInstance {
   const router = new Router();
 
   for (const route of getRoutes()) {