diff --git a/.travis.yml b/.travis.yml
index 27ca813..e081d03 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ jobs:
 cache: cargo
 
 before_script:
-  - sudo apt-get install libgtk-3-dev
+  - sudo apt-get install libgtk-3-dev libgtk-3-dev
 
 script:
   - cargo test --verbose --workspace