diff --git a/requirements.txt b/requirements.txt
index f495e44..12c0175 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ numpy==1.16.4
 pandas==0.24.2
 Pillow==6.1.0
 pkg-resources==0.0.0
-protobuf==3.9.1
+protobuf==3.18.3
 pyarrow==0.14.1
 python-dateutil==2.8.0
 pytz==2019.2