diff --git a/requirements.txt b/requirements.txt
index ce84600..d07f75c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,6 @@ Flask==1.0
 opencv_python==4.0.0.21
 numpy==1.16.2
 Pillow==8.1.1
-protobuf==3.7.1
+protobuf==3.18.3
 inflect==2.1.0
 torchvision==0.2.2.post3