diff --git a/.travis.yml b/.travis.yml
index 175f73a..8daf247 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ before_install:
 install:
   - pip install -q pillow
   - pip install -q numpy
+  - pip install -q networkx
   - python3 setup.py build
 before_script:
   - git clone git://github.com/overviewer/Minecraft-Overviewer-Addons.git ~/mcoa/