diff --git a/src/requirements.txt b/src/requirements.txt
index 0032187..ef9b654 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -18,7 +18,7 @@ numpy==1.16.4
 opencv-python==4.1.2.30
 Pillow==7.1.1
 pkg-resources==0.0.0
-protobuf==3.11.2
+protobuf==3.18.3
 pyparsing==2.4.5
 python-dateutil==2.8.1
 pytz==2019.3