diff --git a/.travis.yml b/.travis.yml
index a5ac7b9..c2a80c8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,7 +46,7 @@ matrix:
           script: cargo build --target "$TARGET" --no-default-features
 
         # minimum version
-        - rust: 1.31.0
+        - rust: 1.34.0
           script: cargo build
 
 sudo: false