diff --git a/install-release.sh b/install-release.sh
index 98d208e..72c4077 100644
--- a/install-release.sh
+++ b/install-release.sh
@@ -302,7 +302,7 @@ download_v2ray() {
   fi
 
   # Verification of V2Ray archive
-  CHECKSUM=$(cat "$ZIP_FILE".dgst | awk -F '= ' '/256=/ {print $2}')
+  CHECKSUM=$(awk -F '= ' '/256=/ {print $2}' < "${ZIP_FILE}.dgst")
   LOCALSUM=$(sha256sum "$ZIP_FILE" | awk '{printf $1}')
   if [[ "$CHECKSUM" != "$LOCALSUM" ]]; then
     echo 'error: SHA256 check failed! Please check your network or try again.'