diff --git a/requirements.txt b/requirements.txt
index 8333442..e1c5cae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ numpy==1.16.2
 pandas==0.24.2
 Pillow==6.0.0
 plyfile==0.7
-protobuf==3.7.1
+protobuf==3.18.3
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1