diff --git a/.travis.yml b/.travis.yml
index d3536bc61f..2676361602 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,6 @@
 language: csharp
+mono:
+  - 3.12.0
 install:
   - sudo apt-get install mono-devel mono-gmcs
   - nuget restore src/chocolatey.sln