diff --git a/requirements.txt b/requirements.txt
index 8c3a8d72..2bb3ab7a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ ecdsa==0.14.1
 grpcio==1.25.0
 grpcio-tools==1.25.0
 ledgerblue==0.1.31
-protobuf==3.11.12
+protobuf==3.18.3
 secp256k1==0.13.2
 eth-keys==0.3.1
 pytest==5.3.5