diff --git a/src/server/server.ts b/src/server/server.ts
index 480ba57..c6e4204 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -4,13 +4,13 @@ import type { Env, NotFoundHandler, ErrorHandler, MiddlewareHandler } from 'hono
 import { createMiddleware } from 'hono/factory'
 import type { H } from 'hono/types'
 import { IMPORTING_ISLANDS_ID } from '../constants.js'
+import { contextStorage } from './context-storage.js'
 import {
   filePathToPath,
   groupByDirectory,
   listByDirectory,
   sortDirectoriesByDepth,
-} from '../utils/file.js'
-import { contextStorage } from './context-storage.js'
+} from './utils/file.js'
 
 const NOTFOUND_FILENAME = '_404.tsx'
 const ERROR_FILENAME = '_error.tsx'
diff --git a/src/utils/file.test.ts b/src/server/utils/file.test.ts
similarity index 100%
rename from src/utils/file.test.ts
rename to src/server/utils/file.test.ts
diff --git a/src/utils/file.ts b/src/server/utils/file.ts
similarity index 100%
rename from src/utils/file.ts
rename to src/server/utils/file.ts