diff --git a/.travis.yml b/.travis.yml
index 0fdf8b2534..4bb5c00251 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -86,6 +86,8 @@ addons:
       - xclip
   homebrew:
     update: false
+    casks:
+      - powershell
     packages:
       - ccache
       - ninja