diff --git a/util/mirror-tarballs b/util/mirror-tarballs
index c7be1f0..9850671 100755
--- a/util/mirror-tarballs
+++ b/util/mirror-tarballs
@@ -789,7 +789,7 @@ cd ..
 
 #################################
 
-ver=0.11
+ver=0.12rc1
 $root/util/get-tarball "https://github.com/openresty/lua-resty-string/tarball/v$ver" -O "lua-resty-string-$ver.tar.gz" || exit 1
 tar -xzf lua-resty-string-$ver.tar.gz || exit 1
 mv openresty-lua-resty-string-* lua-resty-string-$ver || exit 1