diff --git a/setup.cfg b/setup.cfg
index 46e3b9622fcb881c7063e44d1d3dceca75f3a614..45a2a64822599f804946de719d84c1c2d3cdc25c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,6 +15,7 @@ install_requires =
     django~=1.11
     django_rest_framework
     requests
+    validators~=0.12
     pyld
     django-guardian==2.0.0