diff --git a/README.md b/README.md
index 85d4c948..462b7b3f 100644
--- a/README.md
+++ b/README.md
@@ -102,6 +102,8 @@ services:
     # line above must be uncommented to allow external containers to connect. See https://github.com/qdm12/gluetun/wiki/Connect-a-container-to-gluetun#external-container-to-gluetun
     cap_add:
       - NET_ADMIN
+    devices:
+      - /dev/net/tun:/dev/net/tun
     ports:
       - 8888:8888/tcp # HTTP proxy
       - 8388:8388/tcp # Shadowsocks