diff --git a/requirements.txt b/requirements.txt
index a578277..ff917f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -108,7 +108,7 @@ pathlib2==2.3.5
 pbr==5.4.3
 pecan==1.3.3
 prettytable==0.7.2
-protobuf==3.10.0
+protobuf==3.15.0
 psutil==5.6.6
 pyasn1==0.4.7
 pyasn1-modules==0.2.6