diff --git a/.travis.yml b/.travis.yml
index c29af10..21a21bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,7 @@ matrix:
           env: FEATURES="--features hyper-011"
 
         # minimum version
-        - rust: 1.21.0
+        - rust: 1.25.0
           script: cargo build
 
 sudo: false