diff --git a/shadowsocks-all.sh b/shadowsocks-all.sh
index d0c1763..d8012b1 100644
--- a/shadowsocks-all.sh
+++ b/shadowsocks-all.sh
@@ -40,8 +40,8 @@ software=(Shadowsocks-Python ShadowsocksR Shadowsocks-Go Shadowsocks-libev)
 libsodium_file="libsodium-1.0.16"
 libsodium_url="https://github.com/jedisct1/libsodium/releases/download/1.0.16/libsodium-1.0.16.tar.gz"
 
-mbedtls_file="mbedtls-2.9.0"
-mbedtls_url="https://tls.mbed.org/download/mbedtls-2.9.0-gpl.tgz"
+mbedtls_file="mbedtls-2.11.0"
+mbedtls_url="https://tls.mbed.org/download/mbedtls-2.11.0-gpl.tgz"
 
 shadowsocks_python_file="shadowsocks-master"
 shadowsocks_python_url="https://github.com/shadowsocks/shadowsocks/archive/master.zip"
diff --git a/shadowsocks-libev-debian.sh b/shadowsocks-libev-debian.sh
index 4ba1f54..718720d 100644
--- a/shadowsocks-libev-debian.sh
+++ b/shadowsocks-libev-debian.sh
@@ -15,8 +15,8 @@ cur_dir=`pwd`
 libsodium_file="libsodium-1.0.16"
 libsodium_url="https://github.com/jedisct1/libsodium/releases/download/1.0.16/libsodium-1.0.16.tar.gz"
 
-mbedtls_file="mbedtls-2.9.0"
-mbedtls_url="https://tls.mbed.org/download/mbedtls-2.9.0-gpl.tgz"
+mbedtls_file="mbedtls-2.11.0"
+mbedtls_url="https://tls.mbed.org/download/mbedtls-2.11.0-gpl.tgz"
 
 # Stream Ciphers
 ciphers=(
diff --git a/shadowsocks-libev.sh b/shadowsocks-libev.sh
index 1671e32..41ad2bf 100644
--- a/shadowsocks-libev.sh
+++ b/shadowsocks-libev.sh
@@ -15,8 +15,8 @@ cur_dir=`pwd`
 libsodium_file="libsodium-1.0.16"
 libsodium_url="https://github.com/jedisct1/libsodium/releases/download/1.0.16/libsodium-1.0.16.tar.gz"
 
-mbedtls_file="mbedtls-2.9.0"
-mbedtls_url="https://tls.mbed.org/download/mbedtls-2.9.0-gpl.tgz"
+mbedtls_file="mbedtls-2.11.0"
+mbedtls_url="https://tls.mbed.org/download/mbedtls-2.11.0-gpl.tgz"
 
 # Stream Ciphers
 ciphers=(