diff --git a/requirements.txt b/requirements.txt
index 58b11f5..a6be42c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,6 @@
 # sphinx configurations
+pip
+wheel
 zc.recipe.egg == 2.0.2
 collective.recipe.sphinxbuilder == 0.8.2
 Sphinx == 1.2.2