diff --git a/app.ts b/app.ts
index 2814743..3c2a9d6 100644
--- a/app.ts
+++ b/app.ts
@@ -1,4 +1,4 @@
-import { Application, Router } from "https://deno.land/x/oak@v12.1.0/mod.ts";
+import { Application, Router, isHttpError } from "https://deno.land/x/oak@v12.1.0/mod.ts";
 import {
     searchRepositoryWithTopic,
     getRepositoryTags,
@@ -123,13 +123,29 @@ router.get("/:package([a-z0-9_]*@[a-z0-9_]*)/:version?/:path*", async (ctx) => {
     }
 });
 
-
 app.use(router.routes());
 app.use(router.allowedMethods());
 
+app.use(async (ctx, next) => {
+    try{
+        await next();
+    }
+    catch (err) {
+        console.log(err);
+        if (isHttpError(err)) {
+            ctx.response.status = err.status;
+            const { message, status, stack } = err;
+            ctx.response.body = { message, status, stack };
+        }
+        else {                                                                                                   throw err;
+        }
+    }
+});
+
+
+
 //app.use(async (ctx, next) => {
 //    ctx.throw(404);
-//    //ctx.response.status = 404;
 //    //ctx.response.body = "Not Found";
 //    //await next();
 //});