diff --git a/x-ui.sh b/x-ui.sh
index 0ae5e2dd..990c8ea9 100644
--- a/x-ui.sh
+++ b/x-ui.sh
@@ -39,12 +39,12 @@ os_version=""
 os_version=$(grep -i version_id /etc/os-release | cut -d \" -f2 | cut -d . -f1)
 
 if [[ "${release}" == "centos" ]]; then
-    if [[ ${os_version} -lt 8 ]]; then
-        echo -e "${red} Please use CentOS 8 or higher ${plain}\n" && exit 1
+    if [[ ${os_version} -lt 7 ]]; then
+        echo -e "${red} Please use CentOS 7 or higher ${plain}\n" && exit 1
     fi
 elif [[ "${release}" ==  "ubuntu" ]]; then
-    if [[ ${os_version} -lt 20 ]]; then
-        echo -e "${red}please use Ubuntu 20 or higher version！${plain}\n" && exit 1
+    if [[ ${os_version} -lt 18 ]]; then
+        echo -e "${red}please use Ubuntu 18 or higher version！${plain}\n" && exit 1
     fi
 
 elif [[ "${release}" == "fedora" ]]; then