diff --git a/requirements.txt b/requirements.txt
index 8c57a63..2ed4726 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,6 @@ certifi==2019.11.28
 chardet==3.0.4
 decorator==4.4.2
 Django==2.1.15
-django-cas-server==1.1.0
 idna==2.9
 ipython==7.13.0
 ipython-genutils==0.2.0
@@ -24,3 +23,5 @@ six==1.14.0
 traitlets==4.3.3
 urllib3==1.25.8
 wcwidth==0.1.9
+#django-cas-server==1.1.0
+git+https://github.com/tobast/django-cas-server@fix_crypt_des