diff --git a/requirements-test.txt b/requirements-test.txt
index fefaf3b..caf7f0f 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -6,5 +6,5 @@ ray[tune]
 torch==1.12.0
 torchmetrics==0.9.3
 torchvision
-protobuf<=3.20.1
+protobuf<4.21.13
 jsonargparse>=4.13.2