diff --git a/.travis.yml b/.travis.yml
index d365344..8b436de 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ python:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq numpy
+  - sudo apt-get install -qq libopenjpeg2
 
 # command to install dependencies
 install: