diff --git a/tox.ini b/tox.ini
index 430fdfb..6c9be2b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,8 +21,8 @@ deps =
   WebTest
   mock<4
   httmock
-  psycopg2-binary
-  psycopg2
+  psycopg2-binary<2.9
+  psycopg2<2.9
   vobject
   django-ratelimit<3
   django>=2.2,<2.3