diff --git a/requirements_dev_optional.txt b/requirements_dev_optional.txt
index 1ff4c2b052..f469947254 100644
--- a/requirements_dev_optional.txt
+++ b/requirements_dev_optional.txt
@@ -10,7 +10,7 @@ azure-storage-blob==12.8.1 # pyup: ignore
 redis==4.0.2
 types-redis
 types-setuptools
-pymongo==3.12.1
+pymongo==4.0
 # optional test requirements
 tox==3.24.4
 coverage