diff --git a/src/ml/requirements.txt b/src/ml/requirements.txt
index 7872545..605601f 100644
--- a/src/ml/requirements.txt
+++ b/src/ml/requirements.txt
@@ -13,7 +13,7 @@ matplotlib==2.2.2
 numpy==1.14.3
 pandas==0.23.0
 Pillow==5.1.0
-protobuf==3.5.2.post1
+protobuf==3.18.3
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.4