diff --git a/tryton/setup.py b/tryton/setup.py
index 81debad431..063bf0ba2d 100755
--- a/tryton/setup.py
+++ b/tryton/setup.py
@@ -130,7 +130,7 @@ dist = setup(name=name,
     install_requires=[
         'pycairo',
         "python-dateutil",
-        'PyGObject>=3.19',
+        'PyGObject>=3.19,<3.51',
         ],
     extras_require={
         'calendar': ['GooCalendar>=0.7'],