diff --git a/test_requirements.txt b/test_requirements.txt
index f71f7c52..4b1ca1f4 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,6 +1,6 @@
 # Requirements to run unit tests. Tests import from
 # generated code.
-protobuf==6.32.1
+protobuf==6.33.1
 pytest==8.4.2
 pytest-asyncio==0.25.3
 grpc-stubs==1.53.0.5