diff --git a/tox.ini b/tox.ini
index e9d5c1b..dd3989f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ skipsdist = True
 sitepackages = False
 deps =
     coverage
+    authlib~=0.15
     Django~=3.1
     django-crispy-forms~=1.9
     django-polymorphic~=3.0