diff --git a/lib/fetcher.ts b/lib/fetcher.ts
index 050e126..a6be117 100644
--- a/lib/fetcher.ts
+++ b/lib/fetcher.ts
@@ -7,7 +7,7 @@ export default function fetcher(url: string, data = undefined) {
     },
     body: JSON.stringify(data),
   }).then((res) => {
-    if (res.status > 399 && res.status < 200) {
+    if (res.status > 399 || res.status < 200) {
       throw new Error()
     }
     return res.json()