diff --git a/software/dream/software.cfg b/software/dream/software.cfg
index 6884fe04539d06bf91eba9a5eafe62390f87379d..99ccfb363adbf888155543fdfa600f67a3e1c76f 100644
--- a/software/dream/software.cfg
+++ b/software/dream/software.cfg
@@ -38,6 +38,7 @@ pyparsing = 2.0.3
 numpy = 1.9.1
 scipy = 0.13.3
 simpy = 3.0.5
+zope.dottedname = 4.1.0
 
 # indirect dependancies
 collective.recipe.template = 1.11