diff --git a/requirements_dev_optional.txt b/requirements_dev_optional.txt
index 1a6efc470f..56b58d4fc2 100644
--- a/requirements_dev_optional.txt
+++ b/requirements_dev_optional.txt
@@ -7,7 +7,7 @@ ipytree==0.2.1
 # don't let pyup change pinning for azure-storage-blob, need to pin to older
 # version to get compatibility with azure storage emulator on appveyor (FIXME)
 azure-storage-blob==2.0.1 # pyup: ignore
-redis==3.5.3
+redis==6.4.0
 pymongo==3.11.4
 # optional test requirements
 tox==3.14.0