diff --git a/tools/pip-requires b/tools/pip-requires
index 99f7580ef..8d8d200bd 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -8,3 +8,4 @@ iso8601>=0.1.4
 six
 django-pipeline
 django-floppyforms==1.1
+PyYAML