diff --git a/requirements.txt b/requirements.txt
index e244ad5..3ec6364 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ matplotlib==2.2.2
 numpy==1.14.5
 opencv-python==3.4.3.18
 Pillow==6.2.0
-protobuf==3.6.0
+protobuf==3.18.3
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.5