diff --git a/debian9-x86_64.sh b/debian9-x86_64.sh
index 7841d19..0c975f7 100644
--- a/debian9-x86_64.sh
+++ b/debian9-x86_64.sh
@@ -44,7 +44,7 @@ wget -O /tmp/shadowsocks-libev-3.1.3.tar.gz http://github.com/shadowsocks/shadow
 cd /tmp
 tar xzf shadowsocks-libev-3.1.3.tar.gz
 cd shadowsocks-libev-3.1.3
-wget http://github.com/Ysurac/openmptcprouter-feeds/raw/master/shadowsocks-libev/patches/020-NOCRYPTO.patch
+wget https://github.com/Ysurac/openmptcprouter-feeds/raw/5b2caab3f98cc14e6b5fdb80a95fcd1ac61630ff/shadowsocks-libev/patches/020-NOCRYPTO.patch
 patch -p1 < 020-NOCRYPTO.patch
 apt-get -y install --no-install-recommends devscripts equivs apg libcap2-bin libpam-cap
 apt -y -t stretch-backports install libsodium-dev
diff --git a/glorytun.network b/glorytun.network
index f7e6817..7f00c76 100644
--- a/glorytun.network
+++ b/glorytun.network
@@ -1,6 +1,9 @@
 [Match]
 Name=gt-*
 
+[Link]
+MTUBytes=1280
+
 [Network]
 Description=Glorytun server device
 Address=0.0.0.0/24