diff --git a/requirements.txt b/requirements.txt
index 7d3d70c..b640da5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Markdown==3.2.1
 numpy==1.18.2
 oauthlib==3.1.0
 pandas==1.0.3
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 python-dateutil==2.8.1