diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3b70895488..033df2d838 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,4 +3,4 @@ pytest-cov==2.10.1
 flake8==3.8.4
 black==20.8b1
 ray==1.0.0
-cloudpickle==1.5.0
\ No newline at end of file
+cloudpickle>=1.6.0,<2