diff --git a/.travis.yml b/.travis.yml
index 8394cb1..b93cd85 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: rust
 rust:
-- 1.1.0
+- '1.1.0'
 cache: cargo
 script:
 - cargo build --release