diff --git a/requirements.txt b/requirements.txt
index ad00114..99ec08b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Markdown==2.6.11
 numpy==1.14.1
 opencv-python==3.4.0.12
 Pillow==6.2.0
-protobuf==3.5.1
+protobuf==3.18.3
 pytz==2018.3
 PyYAML==5.1
 pyzbar==0.1.4