diff --git a/package.json b/package.json
index 634123e..f5349e9 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "@types/ws": "8.18.1",
     "chokidar": "^5.0.0",
     "connect-history-api-fallback": "^2.0.0",
-    "connect-next": "^4.0.3",
+    "connect-next": "^5.0.0",
     "cross-env": "^10.1.0",
     "express": "^5.2.1",
     "hono": "^4.13.3",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e883aa8..f0b4ab4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -58,8 +58,8 @@ importers:
         specifier: ^2.0.0
         version: 2.0.0
       connect-next:
-        specifier: ^4.0.3
-        version: 4.0.3
+        specifier: ^5.0.0
+        version: 5.0.0
       cross-env:
         specifier: ^10.1.0
         version: 10.1.0
@@ -1167,8 +1167,8 @@ packages:
     resolution: {integrity: sha512-U73+6lQFmfiNPrYbXqr6kZ1i1wiRqXnp2nhMsINseWXO8lDau0LGEffJ8kQi4EjLZympVgRdvqjAgiZ1tgzDDA==}
     engines: {node: '>=0.8'}
 
-  connect-next@4.0.3:
-    resolution: {integrity: sha512-XzXkWnwNtbFJEPqW9gWZBRsS83lbI+alSxSSOL8PbHDqzRG6CMxLOfNGrpFfwr6jx1SqmwLvdNHlMZRaa0z4Fw==}
+  connect-next@5.0.0:
+    resolution: {integrity: sha512-f8s8Vjzr46shiGeR6KIQxDy8i/PRw+cFpzDei9SHEv8C46WVpzfmKIIvYA6z9lkE7Qqiq+XcKlfdsU4MqcUl0w==}
     engines: {node: ^20.19.0 || >=22.12.0}
 
   content-disposition@1.0.1:
@@ -2956,7 +2956,7 @@ snapshots:
 
   connect-history-api-fallback@2.0.0: {}
 
-  connect-next@4.0.3: {}
+  connect-next@5.0.0: {}
 
   content-disposition@1.0.1: {}
 
diff --git a/src/server.ts b/src/server.ts
index a55c0d7..ecd3f2b 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -1718,7 +1718,7 @@ class Server<
 
       const getProxyMiddleware = (
         proxyConfig: DevServerProxyConfigArrayItem,
-      ): NextHandleFunction | undefined => {
+      ): RequestHandler | undefined => {
         const { context, ...proxyOptions } = proxyConfig;
         const pathFilter = proxyOptions.pathFilter ?? context;
 
@@ -1761,7 +1761,7 @@ class Server<
        * ]
        */
       for (const proxyConfigOrCallback of this.options.proxy) {
-        let proxyMiddleware: NextHandleFunction | undefined;
+        let proxyMiddleware: RequestHandler | undefined;
 
         let proxyConfig =
           typeof proxyConfigOrCallback === 'function'