diff --git a/requirements-travis.txt b/requirements-travis.txt
index e49a38e1ea8aa40c83dc2d6d5ab2e7ba95f913e2..76958e47e4c3f90d278317e7b2b49ebec1c7ef61 100644
--- a/requirements-travis.txt
+++ b/requirements-travis.txt
@@ -9,3 +9,6 @@ pep8==1.6.2
 requests==1.2.3
 PyYAML==3.11
 Pillow==2.2.1
+snakefood==1.4
+networkx==1.9.1
+pygraphviz==1.3rc2