diff --git a/dev-requirements.txt b/dev-requirements.txt
index 4add79431..1fcfc0028 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -7,7 +7,7 @@ aiohttp>=3.6.2
 python-dateutil>=2.8.1
 grpcio>=1.49.0
 grpcio-tools>=1.49.0
-protobuf==4.21.7
+protobuf==4.25.8
 six==1.16.0
 tox == 3.26.0
 cloudevents >= 1.0.0