diff --git a/requirements.txt b/requirements.txt
index 0925da1..3c9054a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ mws==0.8.3
 numpy==1.14.0
 olefile==0.44
 Pillow==4.3.0
-protobuf==3.5.1
+protobuf==3.18.3
 pymongo==3.6.0
 python-dateutil==2.6.1
 PyYAML==3.12