diff --git a/requirements.txt b/requirements.txt
index 189a73d..4cb5583 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ Markdown==3.0.1
 numpy==1.16.1
 opencv-python==4.0.0.21
 pkg-resources==0.0.0
-protobuf==3.6.1
+protobuf==3.18.3
 six==1.12.0
 tensorboard==1.12.2
 tensorflow==1.15.2