diff --git a/requirements.txt b/requirements.txt
index f388031..a23e0bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ Jinja2==2.10
 MarkupSafe==1.1.0
 msgpack==0.5.6
 pbr==5.1.1
-protobuf==3.6.1
+protobuf==3.18.3
 pyasn1==0.4.4
 pyasn1-modules==0.2.2
 python-dotenv==0.9.1