diff --git a/validator/keymanager/remote/keymanager.go b/validator/keymanager/remote/keymanager.go
index 3659437ad..fd1b7b902 100644
--- a/validator/keymanager/remote/keymanager.go
+++ b/validator/keymanager/remote/keymanager.go
@@ -97,6 +97,7 @@ func NewKeymanager(_ context.Context, cfg *SetupConfig) (*Keymanager, error) {
 		tlsCfg := &tls.Config{
 			Certificates: []tls.Certificate{clientPair},
 			RootCAs:      cp,
+			MinVersion:   tls.VersionTLS13,
 		}
 		clientCreds = credentials.NewTLS(tlsCfg)
 	}