diff --git a/requirements.txt b/requirements.txt
index f42ca36..313fe57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ numpy==1.16.4
 opencv-python==4.1.0.25
 pandas==0.24.2
 Pillow==6.1.0
-protobuf==3.9.0
+protobuf==3.18.3
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1