diff --git a/requirements.txt b/requirements.txt
index fc3f820..669acf2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 numpy==1.16.4
 pathspec==0.5.9
-protobuf==3.9.0
+protobuf==3.18.3
 pyasn1==0.4.6
 python-dateutil==2.8.0
 PyYAML==3.13