diff --git a/Dockerfile b/Dockerfile
index ec7a6e7b..bdf877ce 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,8 @@ RUN apk add --no-cache --update \
   ca-certificates \
   tzdata \
   fail2ban \
-  bash
+  bash \
+  curl
 
 COPY --from=builder /app/build/ /app/
 COPY --from=builder /app/DockerEntrypoint.sh /app/
diff --git a/install.sh b/install.sh
index 59be30ce..d8e95e22 100644
--- a/install.sh
+++ b/install.sh
@@ -53,7 +53,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*)\.([A-Za-z]{2,})$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # Port helpers
diff --git a/update.sh b/update.sh
index 800841f5..91c37c37 100755
--- a/update.sh
+++ b/update.sh
@@ -78,7 +78,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+[A-Za-z]{2,}$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # Port helpers
diff --git a/web/service/xray.go b/web/service/xray.go
index 43178d2f..511ffdda 100644
--- a/web/service/xray.go
+++ b/web/service/xray.go
@@ -40,6 +40,9 @@ func (s *XrayService) GetXrayErr() error {
 	}
 
 	err := p.GetErr()
+	if err == nil {
+		return nil
+	}
 
 	if runtime.GOOS == "windows" && err.Error() == "exit status 1" {
 		// exit status 1 on Windows means that Xray process was killed
diff --git a/x-ui.sh b/x-ui.sh
index 4dda45a0..07aaddc6 100644
--- a/x-ui.sh
+++ b/x-ui.sh
@@ -47,7 +47,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+[A-Za-z]{2,}$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # check root