diff --git a/requirements-dev.txt b/requirements-dev.txt
index 75490195..3111f74f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -162,7 +162,7 @@ pre-commit==2.18.1
     # via a3m (setup.py)
 prometheus-client==0.14.1
     # via a3m (setup.py)
-protobuf==3.20.0
+protobuf==3.20.3
     # via
     #   googleapis-common-protos
     #   grpcio-reflection
diff --git a/requirements.txt b/requirements.txt
index c4b17b71..f9375571 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,7 +66,7 @@ metsrw==0.3.21
     # via a3m (setup.py)
 prometheus-client==0.14.1
     # via a3m (setup.py)
-protobuf==3.20.0
+protobuf==3.20.3
     # via
     #   googleapis-common-protos
     #   grpcio-reflection