diff --git a/.travis.yml b/.travis.yml
index 3f09b8f87..6060d27da 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ matrix:
                 - libxrandr-dev
                 - libxinerama-dev
                 - libxcursor-dev
+                - libunistring
 
         - os: linux
           dist: trusty
@@ -36,6 +37,7 @@ matrix:
                 - libxrandr-dev
                 - libxinerama-dev
                 - libxcursor-dev
+                - libunistring
 
         - os: linux
           dist: trusty
@@ -54,6 +56,7 @@ matrix:
                 - libxrandr-dev
                 - libxinerama-dev
                 - libxcursor-dev
+                - libunistring
                 - clang
         - os: osx
           language: generic
@@ -78,6 +81,7 @@ install: |
             brew update;
             brew install python3;
             brew install glfw;
+            brew install libunistring;
         else
             mkdir -p $SW;
             curl https://download.calibre-ebook.com/travis/kitty/osx.tar.xz | tar xJ -C $SW;