diff --git a/.travis.yml b/.travis.yml
index 81f98c5..c32635c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: rust
 
 rust:
-  - 1.34.0  # minimum supported toolchain
+  - 1.39.0  # minimum supported toolchain
   - 1.42.0  # pinned toolchain for clippy
   - stable
   - beta