diff --git a/tox.ini b/tox.ini
index e213af00e6..dcaeecdee9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@ envlist = py27-{sqlite,postgresql,mysql}
 [testenv]
 commands = {envpython} setup.py test
 deps =
-    postgresql: psycopg2 >= 2.0
+    postgresql: psycopg2 >= 2.5
     mysql: MySQL-python
 setenv =
     sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}