diff --git a/scripts/install_server.sh b/scripts/install_server.sh
index 0c85dc7..4277ab9 100644
--- a/scripts/install_server.sh
+++ b/scripts/install_server.sh
@@ -872,7 +872,7 @@ is_hysteria1_version() {
 get_installed_version() {
   if is_hysteria_installed; then
     if "$EXECUTABLE_INSTALL_PATH" version > /dev/null 2>&1; then
-      "$EXECUTABLE_INSTALL_PATH" version | grep Version | grep -o 'v[.0-9]*'
+      "$EXECUTABLE_INSTALL_PATH" version | grep '^Version' | grep -o 'v[.0-9]*'
     elif "$EXECUTABLE_INSTALL_PATH" -v > /dev/null 2>&1; then
       # hysteria 1
       "$EXECUTABLE_INSTALL_PATH" -v | cut -d ' ' -f 3