diff --git a/release/install-release.sh b/release/install-release.sh
index 96c576cad..6a2306e18 100755
--- a/release/install-release.sh
+++ b/release/install-release.sh
@@ -194,8 +194,14 @@ getVersion(){
         VER=`/usr/bin/v2ray/v2ray -version 2>/dev/null`
         RETVAL="$?"
         CUR_VER=`echo $VER | head -n 1 | cut -d " " -f2 | cut -d. -f-2`
+        if [[ ${CUR_VER} != v* ]]; then
+            CUR_VER=v${CUR_VER}
+        fi
         TAG_URL="https://api.github.com/repos/v2ray/v2ray-core/releases/latest"
         NEW_VER=`curl ${PROXY} -s ${TAG_URL} --connect-timeout 10| grep 'tag_name' | cut -d\" -f4`
+        if [[ ${NEW_VER} != v* ]]; then
+          NEW_VER=v${NEW_VER}
+        fi
         if [[ $? -ne 0 ]] || [[ $NEW_VER == "" ]]; then
             colorEcho ${RED} "Failed to fetch release information. Please check your network or try again."
             return 3