diff --git a/requirements.txt b/requirements.txt
index 1cf1896..e32492a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ mccabe==0.6.1
 multiaddr==0.0.9
 netaddr==0.7.19
 parsimonious==0.8.1
-protobuf==3.12.0
+protobuf==3.15.0
 pycparser==2.20
 pycryptodome==3.9.7
 pylint==2.5.3