diff --git a/requirements.txt b/requirements.txt
index 43c4d5a..ec2907c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ numpy==1.16.4
 opencv-contrib-python==4.1.0.25
 opencv-python==4.1.0.25
 Pillow==6.2.0
-protobuf==3.8.0
+protobuf==3.18.3
 PyYAML==5.1.1
 scipy==1.2.2
 six==1.12.0