diff --git a/pkgbuild b/pkgbuild
index 0e5db74..14155fb 100755
--- a/pkgbuild
+++ b/pkgbuild
@@ -376,9 +376,12 @@ check_buildscript() {
 	[ "$(basename $(pwd))" = "$name" ] || { msgerr "Port name and Directory name is different!"; exit 1; }
 	[ "$version" ] || { msgerr "'version' is empty!"; exit 1; }
 	[ "$release" ] || { msgerr "'release' is empty!"; exit 1; }
+	echo "$release" | grep -q [^0-9] && { msgerr "only numberic allowed in 'release'"; exit 1; }
 	[ "$(command -v build)" ] || { msgerr "'build' function not exist!"; exit 1; }
-	[ "$(echo "$version" | grep '-')" ] && { msgerr "'version' should not contain '-'."; exit 1; }
-	[ "$(echo "$release" | grep '-')" ] && { msgerr "'release' should not contain '-'."; exit 1; }
+	echo "$version" | grep -q '-' && { msgerr "'version' should not contain '-'."; exit 1; }
+	if [ "$release" -gt 99 ] || [ "$release" -lt 1 ]; then
+		msgerr "'release' should numberic between 1 to 99"; exit 1
+	fi
 	[ "$description" ] || { msgerr "'description' is empty!"; exit 1; }
 }