1 files changed, 1 insertions, 0 deletions
diff --git a/requirements.txt b/requirements.txt
index 92adc5f..301bc96 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ pyrsistent
 python-mimeparse
 unittest2>=1.0.0
 traceback2
+zope.interface