diff --git a/requirements.txt b/requirements.txt
index 17cb799..a78615e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 numpy==1.18.0
 pandas==0.25.3
-protobuf==3.11.2
+protobuf==3.18.3
 python-dateutil==2.8.1
 pytz==2019.3
 six==1.13.0