diff --git a/.travis.yml b/.travis.yml
index 90281b8fe4..354043eb25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: csharp
 sudo: false
 mono:
-  - alpha
+  - 4.0.4
 script:
   - ./build.sh --quiet verify