diff --git a/setup.py b/setup.py
index ee5848eb6..d3e708eed 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@
         'astroplan==0.8',
         'astropy==4.2.1',
         'beautifulsoup4~=4.9',
-        'django~=3.1',  # TOM Toolkit requires db math functions
+        'django>=3.1,<5.0',  # TOM Toolkit requires db math functions
         'djangorestframework~=3.12',
         'django-bootstrap4~=3.0',
         'django-contrib-comments~=2.0',  # Earlier version are incompatible with Django >= 3.0