diff --git a/dev-requirements.txt b/dev-requirements.txt
index 93ed92b..a2d3cfd 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -87,7 +87,7 @@ pip-tools==7.4.1
     # via elastic-opentelemetry (pyproject.toml)
 pluggy==1.5.0
     # via pytest
-protobuf==4.25.3
+protobuf==5.28.0
     # via
     #   googleapis-common-protos
     #   opentelemetry-proto