diff --git a/alpinelinux/install-release.sh b/alpinelinux/install-release.sh
index 49814a6..d3781ec 100644
--- a/alpinelinux/install-release.sh
+++ b/alpinelinux/install-release.sh
@@ -103,13 +103,12 @@ install_software() {
 }
 
 download_xray() {
-    curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE" "$DOWNLOAD_LINK" -#
-    if [ "$?" -ne '0' ]; then
+    if ! curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE" "$DOWNLOAD_LINK" -#; then
         echo 'error: Download failed! Please check your network or try again.'
         exit 1
     fi
-    curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE.dgst" "$DOWNLOAD_LINK.dgst" -#
-    if [ "$?" -ne '0' ]; then
+
+    if ! curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE.dgst" "$DOWNLOAD_LINK.dgst" -#; then
         echo 'error: Download failed! Please check your network or try again.'
         exit 1
     fi
@@ -168,8 +167,7 @@ install_startup_service_file() {
     OPENRC='0'
     if [ ! -f '/etc/init.d/xray' ]; then
         mkdir "${TMP_DIRECTORY}init.d/"
-        curl -o "${TMP_DIRECTORY}init.d/xray" https://raw.githubusercontent.com/XTLS/Xray-install/main/alpinelinux/init.d/xray -s
-        if [ "$?" -ne '0' ]; then
+        if ! curl -o "${TMP_DIRECTORY}init.d/xray" https://raw.githubusercontent.com/XTLS/Xray-install/main/alpinelinux/init.d/xray -s; then
             echo 'error: Failed to start service file download! Please check your network or try again.'
             exit 1
         fi