diff --git a/shadowsocks.sh b/shadowsocks.sh
index 64de3fc..adba485 100644
--- a/shadowsocks.sh
+++ b/shadowsocks.sh
@@ -43,7 +43,7 @@ software=(Shadowsocks-libev ShadowsocksR)
 libsodium_file="libsodium-1.0.18"
 libsodium_url="https://github.com/jedisct1/libsodium/releases/download/1.0.18-RELEASE/libsodium-1.0.18.tar.gz"
 
-mbedtls_file="mbedtls-2.16.6"
+mbedtls_file="mbedtls-2.23.0"
 mbedtls_url="https://github.com/ARMmbed/mbedtls/archive/'"$mbedtls_file"'.tar.gz"
 
 shadowsocks_libev_init="/etc/init.d/shadowsocks-libev"