diff --git a/packages/backend/src/index.ts b/packages/backend/src/index.ts
index b71af6f..b5163aa 100644
--- a/packages/backend/src/index.ts
+++ b/packages/backend/src/index.ts
@@ -41,7 +41,7 @@ app.use(
 
 app.use(cookieParser());
 
-app.use("/oauth/redirect", oauthRedirectRouter);
+app.use("/oauth/redirect", sameOauthState, oauthRedirectRouter);
 app.use("/oauth", oauthUrlRouter);
 
 app.use(