diff --git a/.travis.yml b/.travis.yml
index 33dc26e..d922125 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,6 @@ cache:
 
 matrix:
   include:
-    - rust: 1.21.0
     - rust: stable
     - rust: beta
     - rust: nightly