diff --git a/.travis.yml b/.travis.yml
index 8f40afe..0dbdea8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: rust
 
 rust:
   - nightly
-  - 1.0.0-beta.3
+  - 1.0.0-beta.4
 
 after_success: |
   [ $TRAVIS_BRANCH = master ] &&