diff --git a/requirements.txt b/requirements.txt
index f730834..0b84639 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ Markdown==3.1.1
 mock==3.0.5
 numpy==1.16.3
 opencv-python==4.1.0.25
-protobuf==3.7.1
+protobuf==3.18.3
 PyYAML==5.1
 scikit-learn==0.21.2
 scipy==1.3.0