diff --git a/requirements.txt b/requirements.txt
index a866cb0..bd649ac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ nose==1.3.7
 numpy==1.16.2
 opencv-python==4.0.0.21
 Pillow==5.4.1
-protobuf==3.7.1
+protobuf==3.18.3
 py==1.4.31
 py-bcrypt==0.4
 pycups==1.9.72