diff --git a/tox.ini b/tox.ini
index 0764ac4..5102531 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ usedevelop =
 deps =
   dj111: django>=1.11,<1.12
   dj22: django>=2.2,<2.3
-  pg: psycopg2
+  pg: psycopg2<2.9
   mock<4
   httmock
   pytest