diff --git a/requirements.txt b/requirements.txt
index f093a27..23aa034 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ Markdown==3.1.1
 multidict==4.5.2
 numpy==1.16.4
 pid==2.2.3
-protobuf==3.8.0
+protobuf==3.18.3
 pyyaml==5.4
 semver==2.8.1
 six==1.12.0