diff --git a/.travis.yml b/.travis.yml
index 2e0013b..9ff7b50 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ env:
   matrix:
     # Use _ZSH_VERSION since if ZSH_VERSION is present, travis cacher thinks it
     # is running in zsh and tries to use zsh specific functions.
+    - _ZSH_VERSION=5.6.2
     - _ZSH_VERSION=5.5.1
     - _ZSH_VERSION=5.4.2
     - _ZSH_VERSION=5.3.1