diff --git a/requirements.txt b/requirements.txt
index a4b2f37..50faa3c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Markdown==3.1.1
 networkx==2.3
 numpy==1.16.4
 pandas==0.24.2
-protobuf==3.8.0
+protobuf==3.18.3
 python-dateutil==2.8.0
 pytz==2019.1
 six==1.12.0