diff --git a/.travis.yml b/.travis.yml
index 3e87fe0..33cfe66 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,8 +10,7 @@ addons:
     - libssl-dev
     - libunwind8
     - zlib1g
-mono:
-  - 4.0.5
+mono: none
 os:
   - linux
   - osx