diff --git a/src/requirements.txt b/src/requirements.txt
index d305daf..282b7e0 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -3,7 +3,7 @@ GitPython==2.1.10
 grpcio==1.15.0
 grpcio-tools==1.15.0
 prometheus-client==0.3.1
-protobuf==3.6.1
+protobuf==3.18.3
 PyYAML
 requests>=2.20.0
 six==1.11.0