diff --git a/install-release.sh b/install-release.sh
index a3bf72f..cf74790 100644
--- a/install-release.sh
+++ b/install-release.sh
@@ -429,7 +429,7 @@ stop_v2ray() {
 
 check_update() {
   if [[ -f '/etc/systemd/system/v2ray.service' ]]; then
-    (get_version)
+    get_version
     local get_ver_exit_code=$?
     if [[ "$get_ver_exit_code" -eq '0' ]]; then
       echo "info: Found the latest release of V2Ray $RELEASE_VERSION . (Current release: $CURRENT_VERSION)"