diff --git a/.travis.yml b/.travis.yml
index 6c43eadf9..61ca24142 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,12 @@
 language: c
 compiler: gcc
 
+addons:
+  apt:
+    packages:
+      - doxygen
+      - graphviz
+
 cache:
   directories:
     - thirdparty