diff --git a/setup.py b/setup.py
index f37be25..d87f789 100644
--- a/setup.py
+++ b/setup.py
@@ -109,7 +109,7 @@ setup(
     install_requires=[
         'django<2.3',
         'isodate',
-        'psycopg2',
+        'psycopg2<2.9',
         'jsonschema',
         'gadjo',
         'six',