diff --git a/setup.py b/setup.py
index e024dae..cc2da1c 100644
--- a/setup.py
+++ b/setup.py
@@ -79,7 +79,7 @@
     packages=find_packages(exclude=['contrib', 'docs', 'tests*']),
     namespace_packages=['ckanext'],
 
-    install_requires=['pysaml2>=6.5.1'],
+    install_requires=['pysaml2>=6.5.1,<7.4'],
 
     # If there are data files included in your packages that need to be
     # installed, specify them here.  If using Python 2.6 or less, then these