diff --git a/firmware/protob/messages.options b/firmware/protob/messages.options
index b42e5efad6..c4c0f06675 100644
--- a/firmware/protob/messages.options
+++ b/firmware/protob/messages.options
@@ -142,6 +142,13 @@ GetECDHSessionKey.ecdsa_curve_name	max_size:32
 
 ECDHSessionKey.session_key		max_size:65
 
+NEMGetAddress.address_n			max_count:8
+
+NEMAddress.address			max_size:41
+
+NEMSignedTx.data			max_size:2048
+NEMSignedTx.signature			max_size:64
+
 # deprecated
 SimpleSignTx				skip_message:true
 
diff --git a/firmware/protob/types.options b/firmware/protob/types.options
index bd56519202..6b7afbb2d7 100644
--- a/firmware/protob/types.options
+++ b/firmware/protob/types.options
@@ -36,3 +36,37 @@ IdentityType.user			max_size:64
 IdentityType.host			max_size:64
 IdentityType.port			max_size:6
 IdentityType.path			max_size:256
+
+NEMTransactionCommon.address_n		max_count:8
+NEMTransactionCommon.signer		max_size:32
+
+NEMTransfer.recipient			max_size:41
+NEMTransfer.public_key			max_size:32
+NEMTransfer.payload			max_size:256
+NEMTransfer.mosaics			max_count:16
+
+NEMMosaic.namespace			max_size:145
+NEMMosaic.mosaic			max_size:33
+
+NEMProvisionNamespace.namespace		max_size:65
+NEMProvisionNamespace.parent		max_size:81
+NEMProvisionNamespace.sink		max_size:41
+
+NEMMosaicCreation.sink			max_size:41
+
+NEMMosaicDefinition.name		max_size:32
+NEMMosaicDefinition.ticker		max_size:16
+NEMMosaicDefinition.namespace		max_size:145
+NEMMosaicDefinition.mosaic		max_size:33
+NEMMosaicDefinition.levy_address	max_size:41
+NEMMosaicDefinition.levy_namespace	max_size:145
+NEMMosaicDefinition.levy_mosaic		max_size:33
+NEMMosaicDefinition.description		max_size:513
+NEMMosaicDefinition.networks		max_count:8
+
+NEMMosaicSupplyChange.namespace		max_size:145
+NEMMosaicSupplyChange.mosaic		max_size:33
+
+NEMAggregateModification.modifications	max_count:16
+
+NEMCosignatoryModification.public_key	max_size:32
diff --git a/vendor/trezor-common b/vendor/trezor-common
index 5f7a1a7a5a..c41f84e221 160000
--- a/vendor/trezor-common
+++ b/vendor/trezor-common
@@ -1 +1 @@
-Subproject commit 5f7a1a7a5a4311fd71ed113624dd1d0fe9e72ff5
+Subproject commit c41f84e221f0fc370fcad399541f6fff00f717b8