diff --git a/requirements.txt b/requirements.txt
index 0b6975b..0f965f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 Django==1.11.5
+django-cas-ng==3.5.8
 django-markdownx==2.0.21
 django-solo==1.1.2
 Markdown==2.6.9