diff --git a/requirements.txt b/requirements.txt
index 15520d3..005cea4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mccabe==0.6.1
 mypy==0.770
 mypy-extensions==0.4.3
 mysql-connector-python==8.0.20
-protobuf==3.12.1
+protobuf==3.18.3
 pycodestyle==2.6.0
 pyflakes==2.2.0
 pylint==2.5.2