diff --git a/requirements.txt b/requirements.txt
index 7e47d5c..3728a5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 grpcio==1.26.0
 grpcio-tools==1.26.0
 numpy==1.18.1
-protobuf==3.11.2
+protobuf==3.18.3
 opencv-python==4.1.0.25
 Flask==1.1.1
\ No newline at end of file