diff --git a/AliyunOpenApiSDK.sh b/AliyunOpenApiSDK.sh
index ced13e6..ad9e171 100755
--- a/AliyunOpenApiSDK.sh
+++ b/AliyunOpenApiSDK.sh
@@ -2,7 +2,7 @@
 
 for _aliapi_command in openssl curl; do
     if ! command -v $_aliapi_command &> /dev/null; then
-        echo "Aliyun OpenAPI SDK: $_aliapi_command command not found"
+        echo "Aliyun OpenAPI SDK: $_aliapi_command command not found" >&2
         exit 127
     fi
 done