diff --git a/install-release.sh b/install-release.sh
index 52f76bf..cd64b83 100644
--- a/install-release.sh
+++ b/install-release.sh
@@ -304,7 +304,7 @@ download_v2ray() {
   # Verification of V2Ray archive
   for LISTSUM in 'md5' 'sha1' 'sha256' 'sha512'; do
     SUM="$(${LISTSUM}sum "$ZIP_FILE" | sed 's/ .*//')"
-    CHECKSUM="$(grep ${LISTSUM^^} "$ZIP_FILE".dgst | grep "$SUM" -o -a | uniq)"
+    CHECKSUM="$(grep $SUM "$ZIP_FILE".dgst -o -a | uniq)"
     if [[ "$SUM" != "$CHECKSUM" ]]; then
       echo 'error: Check failed! Please check your network or try again.'
       return 1