diff --git a/requirements.txt b/requirements.txt
index d83d898..8b56326 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ MarkupSafe==1.0
 numpy==1.14.5
 pandas==0.24.2
 Pillow==6.1.0
-protobuf==3.6.0
+protobuf==3.18.3
 python-dateutil==2.8.0
 pytz==2018.4
 PyYAML==3.12