diff --git a/packages/backend/server/src/plugins/oauth/providers/oidc.ts b/packages/backend/server/src/plugins/oauth/providers/oidc.ts
index e0d0e67f0f..e55fdefeaa 100644
--- a/packages/backend/server/src/plugins/oauth/providers/oidc.ts
+++ b/packages/backend/server/src/plugins/oauth/providers/oidc.ts
@@ -14,7 +14,7 @@ const OIDCTokenSchema = z.object({
   access_token: z.string(),
   expires_in: z.number(),
   refresh_token: z.string(),
-  scope: z.string(),
+  scope: z.string().optional(),
   token_type: z.string(),
 });