diff --git a/requirements.txt b/requirements.txt
index a10f3da..3a23e1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@ grpcio-tools==1.21.1
 numpy==1.22.0
 opencv-python==4.2.0.32
 pkg-resources==0.0.0
-protobuf==3.15.0
+protobuf==3.18.3
 six==1.12.0