diff --git a/go.mod b/go.mod
index 5ac83bc4..4f6b43c3 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	firebase.google.com/go/v4 v4.8.0
 	github.com/aws/aws-sdk-go-v2 v0.17.0
 	github.com/bits-and-blooms/bloom/v3 v3.1.0
-	github.com/code-payments/code-protobuf-api v1.5.0
+	github.com/code-payments/code-protobuf-api v1.6.0
 	github.com/emirpasic/gods v1.12.0
 	github.com/envoyproxy/protoc-gen-validate v0.1.0
 	github.com/golang-jwt/jwt/v5 v5.0.0
diff --git a/go.sum b/go.sum
index a9b2a12c..2e2946ee 100644
--- a/go.sum
+++ b/go.sum
@@ -108,8 +108,8 @@ github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I=
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
-github.com/code-payments/code-protobuf-api v1.5.0 h1:zysEaGMfl4kcJcsO91VNBXkP9zFeG/nbChn4MycDW3s=
-github.com/code-payments/code-protobuf-api v1.5.0/go.mod h1:pHQm75vydD6Cm2qHAzlimW6drysm489Z4tVxC2zHSsU=
+github.com/code-payments/code-protobuf-api v1.6.0 h1:u+za1DMu7gyH9RqeAlpxtpe1QR57Yywq/Sh2d1MNT3k=
+github.com/code-payments/code-protobuf-api v1.6.0/go.mod h1:pHQm75vydD6Cm2qHAzlimW6drysm489Z4tVxC2zHSsU=
 github.com/containerd/continuity v0.0.0-20190827140505-75bee3e2ccb6 h1:NmTXa/uVnDyp0TY5MKi197+3HWcnYWfnHGyaFthlnGw=
 github.com/containerd/continuity v0.0.0-20190827140505-75bee3e2ccb6/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
diff --git a/pkg/code/server/grpc/messaging/server_test.go b/pkg/code/server/grpc/messaging/server_test.go
index 8d3abee2..a1569320 100644
--- a/pkg/code/server/grpc/messaging/server_test.go
+++ b/pkg/code/server/grpc/messaging/server_test.go
@@ -604,7 +604,6 @@ func TestSendMessage_RequestToLogin_HappyPath(t *testing.T) {
 	require.NotNil(t, savedProtoMessage.GetRequestToLogin())
 	assert.Equal(t, sendMessageCall.req.Message.GetRequestToLogin().Verifier.Value, savedProtoMessage.GetRequestToLogin().Verifier.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetRequestToLogin().Domain.Value, savedProtoMessage.GetRequestToLogin().Domain.Value)
-	assert.Equal(t, sendMessageCall.req.Message.GetRequestToLogin().Nonce.Value, savedProtoMessage.GetRequestToLogin().Nonce.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetRequestToLogin().Signature.Value, savedProtoMessage.GetRequestToLogin().Signature.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetRequestToLogin().RendezvousKey.Value, savedProtoMessage.GetRequestToLogin().RendezvousKey.Value)
 	assert.Equal(t, sendMessageCall.req.Signature.Value, savedProtoMessage.SendMessageRequestSignature.Value)
@@ -678,7 +677,6 @@ func TestSendMessage_LoginAttempt_HappyPath(t *testing.T) {
 	require.NotNil(t, savedProtoMessage.GetLoginAttempt())
 	assert.Equal(t, sendMessageCall.req.Message.GetLoginAttempt().UserId.Value, savedProtoMessage.GetLoginAttempt().UserId.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetLoginAttempt().Domain.Value, savedProtoMessage.GetLoginAttempt().Domain.Value)
-	assert.Equal(t, sendMessageCall.req.Message.GetLoginAttempt().Nonce.Value, savedProtoMessage.GetLoginAttempt().Nonce.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetLoginAttempt().Signature.Value, savedProtoMessage.GetLoginAttempt().Signature.Value)
 	assert.Equal(t, sendMessageCall.req.Message.GetLoginAttempt().RendezvousKey.Value, savedProtoMessage.GetLoginAttempt().RendezvousKey.Value)
 	assert.Equal(t, sendMessageCall.req.Signature.Value, savedProtoMessage.SendMessageRequestSignature.Value)
diff --git a/pkg/code/server/grpc/messaging/testutil.go b/pkg/code/server/grpc/messaging/testutil.go
index 19e2011e..049966ed 100644
--- a/pkg/code/server/grpc/messaging/testutil.go
+++ b/pkg/code/server/grpc/messaging/testutil.go
@@ -801,8 +801,6 @@ func (c *clientEnv) sendRequestToLoginMessage(t *testing.T, rendezvousKey *commo
 		Domain: &commonpb.Domain{
 			Value: "app.getcode.com",
 		},
-		Nonce:     testutil.NewRandomAccount(t).ToProto(),
-		Timestamp: timestamppb.Now(),
 		RendezvousKey: &messagingpb.RendezvousKey{
 			Value: rendezvousKey.PublicKey().ToBytes(),
 		},
@@ -868,8 +866,6 @@ func (c *clientEnv) sendLoginAttemptMessage(t *testing.T, rendezvousKey *common.
 		Domain: &commonpb.Domain{
 			Value: "app.getcode.com",
 		},
-		Nonce:     testutil.NewRandomAccount(t).ToProto(),
-		Timestamp: timestamppb.Now(),
 		RendezvousKey: &messagingpb.RendezvousKey{
 			Value: rendezvousKey.PublicKey().ToBytes(),
 		},