diff --git a/plip-zope4.cfg b/plip-zope4.cfg
index 075db5c8a9..b2443c239a 100644
--- a/plip-zope4.cfg
+++ b/plip-zope4.cfg
@@ -92,6 +92,7 @@ eggs =
     Plone
     ZServer
     Products.TemporaryFolder
+    Products.Sessions
     Pillow
     Products.CMFPlone
 # Products.CMFCore dependencies