diff --git a/setup.cfg b/setup.cfg
index b354fb1..08b6ea6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ install_requires =
   python-dateutil>=2.7
   PyYAML>=3.0
   regex
-  rt>=2.0
+  rt>=2.0,<3.0
   thefuzz
 packages = find:
 python_requires = >=3.6