diff --git a/.travis.yml b/.travis.yml
index 6ef81aa..e46684f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,4 +20,4 @@ addons:
     - time
     - libxen-dev
 env:
-  - OCAML_VERSION=4.04 MIRAGE_BACKEND=xen PINS="mirage-nat:https://github.com/talex5/mirage-nat.git#cleanup"
+  - OCAML_VERSION=4.04 MIRAGE_BACKEND=xen PINS="mirage-nat:https://github.com/talex5/mirage-nat.git#cleanup tcpip:https://github.com/talex5/mirage-tcpip.git#fix-length-checks"