diff --git a/buildout.cfg b/buildout.cfg
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -13,6 +13,7 @@ eggs = ipython==0.8.4
        rdflib==3.2.1
        restkit==4.1.2
        Louie==1.1
+       webcolors==1.4
 
 python = python
 interpreter = python