diff --git a/requirements.txt b/requirements.txt
index e020801..11584d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ Jinja2==2.11.1
 lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pylint==2.4.4