diff --git a/ner/code/requirements.txt b/ner/code/requirements.txt
index c2a26af..b9f4020 100644
--- a/ner/code/requirements.txt
+++ b/ner/code/requirements.txt
@@ -13,7 +13,7 @@ Keras==2.2.0
 m2r==0.1.12
 Markdown==2.6.9
 numpy==1.13.3
-protobuf==3.5.1
+protobuf==3.18.3
 python-dateutil==2.6.0
 pytz==2017.2
 PyYAML==4.2b1