diff --git a/NER/requirements.txt b/NER/requirements.txt
index 16ac1e0..be700a3 100644
--- a/NER/requirements.txt
+++ b/NER/requirements.txt
@@ -13,7 +13,7 @@ mock==2.0.0
 numpy==1.13.3
 pandas==0.20.3
 pbr==3.1.1
-protobuf==3.4.0
+protobuf==3.15.0
 python-dateutil==2.6.1
 pytz==2017.2
 requests==2.20.0