diff --git a/machine-learning/requirements.txt b/machine-learning/requirements.txt
index c46b507..9253ba3 100644
--- a/machine-learning/requirements.txt
+++ b/machine-learning/requirements.txt
@@ -17,7 +17,7 @@ mccabe==0.6.1
 numpy==1.14.1
 pathlib2==2.3.0
 Pillow==5.0.0
-protobuf==3.5.1
+protobuf==3.18.3
 pylint==1.8.2
 pytz==2018.3
 raven==6.6.0