diff --git a/requirements.txt b/requirements.txt
index 942d984..2907d19 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ Jinja2==2.11.2
 lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
-protobuf==3.11.3
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pylint==2.4.4