diff --git a/uni_modules/uts-syntaxcase/utssdk/index.uts b/uni_modules/uts-syntaxcase/utssdk/index.uts
index c6b78f3eac21a2995e661d52f7de73df84fa333f..63d788a14e0a4f0e0ddae725067b8fa8393321e6 100644
--- a/uni_modules/uts-syntaxcase/utssdk/index.uts
+++ b/uni_modules/uts-syntaxcase/utssdk/index.uts
@@ -128,6 +128,6 @@ class RequestTaskImpl implements RequestTask {
     }
 }
 
-export function request(url : string) : RequestTask {
+export function request(url : string) : RequestTask | null {
     return new RequestTaskImpl(url)
 }
\ No newline at end of file