diff --git a/src/content/util.ts b/src/content/util.ts
deleted file mode 100644
index c2a444e..0000000
--- a/src/content/util.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import {Context} from 'koa';
-
-export function since_last_modified(ctx: Context, last_modified: Date): boolean{
-    const con = ctx.get("If-Modified-Since");
-    if(con === "") return false;
-    const mdate = new Date(con);
-    if(last_modified > mdate) return false;
-    ctx.status = 304;
-    return true;
-}
diff --git a/src/route/manga.ts b/src/route/manga.ts
index d342452..44ef2b7 100644
--- a/src/route/manga.ts
+++ b/src/route/manga.ts
@@ -2,7 +2,7 @@
 import {Context, DefaultContext, DefaultState, Next} from 'koa';
 import StreamZip, { ZipEntry } from 'node-stream-zip';
 import {orderBy} from 'natural-orderby';
-import {since_last_modified} from '../content/util';
+import {since_last_modified} from './util';
 import {ContentContext} from './context';
 import Router from 'koa-router';
 
diff --git a/src/route/util.ts b/src/route/util.ts
index 0116694..9e4892e 100644
--- a/src/route/util.ts
+++ b/src/route/util.ts
@@ -1,4 +1,6 @@
 
+import {Context} from 'koa';
+
 
 export function ParseQueryNumber(s: string|undefined): number| undefined{
     if(s === undefined) return undefined;
@@ -19,4 +21,13 @@ export function ParseQueryBoolean(s: string|undefined): [boolean,boolean|undefin
     else
         return [false,undefined]
     return [true,value]
-}
\ No newline at end of file
+}
+
+export function since_last_modified(ctx: Context, last_modified: Date): boolean{
+    const con = ctx.get("If-Modified-Since");
+    if(con === "") return false;
+    const mdate = new Date(con);
+    if(last_modified > mdate) return false;
+    ctx.status = 304;
+    return true;
+}