diff --git a/.travis.yml b/.travis.yml
index 1382edc22..30fc7ec05 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: csharp
 mono:
-  - latest
+  - 4.8.1
 
 script:
   - ./build.sh