diff --git a/bot/setup.py b/bot/setup.py
index ce06d9426489963cbd2398e9d0e314e9499c9a27..ee6ab93b7ebc744b810368fff2009f9eb15e1e45 100755
--- a/bot/setup.py
+++ b/bot/setup.py
@@ -107,7 +107,7 @@
         'appdirs>=1.4.4',
         'celery~=5.3',
         'housekeeping~=1.1',
-        'RBTools>=4.0,<6',
+        'RBTools>=4.0,<7',
 
         # We unconditionally include these plugins to ensure they're present.
         'flake8-json>=21.1',