diff --git a/requirements.txt b/requirements.txt
index f7002b4..326bb22 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ mkl-service==2.3.0
 mutils==1.0.5
 numpy==1.18.3
 object-detection==0.1
-protobuf==3.11.3
+protobuf==3.18.3
 python-dateutil==2.8.1
 pytz==2019.3
 pyzmq==19.0.0