diff --git a/requirements.txt b/requirements.txt
index 6421f80..d281cf0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
 python-cas==1.5.*
+python-ldap
diff --git a/tox.ini b/tox.ini
index 2e4d276..9a5c460 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,6 +8,7 @@ deps =
   django22: Django==2.2.*
   django30: Django==3.0.*
   python-cas
+  python-ldap
 commands =
   python --version
   python runtests.py