diff --git a/requirements.txt b/requirements.txt
index b173242..b2f7ec8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ mock==3.0.5
 numpy==1.16.3
 opencv-contrib-python==4.1.0.25
 Pillow==6.1.0
-protobuf==3.8.0
+protobuf==3.18.3
 PyYAML==5.1.1
 scikit-learn==0.21.2
 scipy==1.3.0