diff --git a/requirements.txt b/requirements.txt
index 20d20e6..3628be5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ docutils
 flask
 flask-wtf
 markdown
+psutil
 pygit2 >= 0.20.1
 pygments
 python-fedora