diff --git a/requirements.txt b/requirements.txt
index e2d6a6fc..664cd94b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pandas>=0.23
+pandas>=0.23,<2.0.0
 scikit-learn>=0.23
 numba>0.54
 sparse>=0.9