diff --git a/.travis.yml b/.travis.yml
index c46850f..1829328 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ dist: xenial
 
 rust:
     - "1.32.0"
+    - "1.33.0"
     - "stable"
     - "beta"
     - "nightly"