diff --git a/.travis.yml b/.travis.yml
index f66c68771..ce78796e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -88,6 +88,7 @@ install: |
             brew install python3;
             brew install glfw;
             brew install libunistring;
+            brew install harfbuzz;
         else
             mkdir -p $SW;
             curl https://download.calibre-ebook.com/travis/kitty/osx.tar.xz | tar xJ -C $SW;