diff --git a/Pipfile b/Pipfile
index fa6c23595..4f11b4fc2 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,3 +9,4 @@ trezor = {git = "https://github.com/trezor/python-trezor", editable = true, ref
 pytest = "*"
 mock = "*"
 typing = "*"
+protobuf = "==3.4.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index e9c200aaa..eab726117 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "83b71604a8624c27e2076b38af223d180479f5511661e7642fe9faf00d4e53f3"
+            "sha256": "495d8a64b9cfa1479cf756fc05dddbf8ca34a12186478ee46a7fa8aba140e0cb"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -14,6 +14,13 @@
         ]
     },
     "default": {
+        "atomicwrites": {
+            "hashes": [
+                "sha256:240831ea22da9ab882b551b31d4225591e5e447a68c5e188db5b89ca1d487585",
+                "sha256:a24da68318b08ac9c9c45029f4a10371ab5b20e4226738e150e6e7c571630ae6"
+            ],
+            "version": "==1.1.5"
+        },
         "attrs": {
             "hashes": [
                 "sha256:4b90b09eeeb9b88c35bc642cbac057e45a5fd85367b985bd2809c62b7b939265",
@@ -51,10 +58,10 @@
         },
         "idna": {
             "hashes": [
-                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f",
-                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4"
+                "sha256:156a6814fb5ac1fc6850fb002e0852d56c0c8d2531923a51032d1b70760e186e",
+                "sha256:684a38a6f903c1d71d6d5fac066b58d7768af4de2b832e426ec79c30daa94a16"
             ],
-            "version": "==2.6"
+            "version": "==2.7"
         },
         "libusb1": {
             "hashes": [
@@ -78,11 +85,11 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:0dd8f72eeab0d2c3bd489025bb2f6a1b8342f9b198f6fc37b52d15cfa4531fea",
-                "sha256:11a625025954c20145b37ff6309cd54e39ca94f72f6bb9576d1195db6fa2442e",
-                "sha256:c9ce7eccdcb901a2c75d326ea134e0886abfbea5f93e91cc95de9507c0816c44"
+                "sha256:2b6b9893337bfd9166bee6a62c2b0c9fe7735dcf85948b387ec8cba30e85d8e8",
+                "sha256:6703844a52d3588f951883005efcf555e49566a48afd4db4e965d69b883980d3",
+                "sha256:a18d870ef2ffca2b8463c0070ad17b5978056f403fb64e3f15fe62a52db21cc0"
             ],
-            "version": "==4.1.0"
+            "version": "==4.2.0"
         },
         "pbkdf2": {
             "hashes": [
@@ -92,10 +99,10 @@
         },
         "pbr": {
             "hashes": [
-                "sha256:4e8a0ed6a8705a26768f4c3da26026013b157821fe5f95881599556ea9d91c19",
-                "sha256:dae4aaa78eafcad10ce2581fc34d694faa616727837fd8e55c1a00951ad6744f"
+                "sha256:4f2b11d95917af76e936811be8361b2b19616e5ef3b55956a429ec7864378e0c",
+                "sha256:e0f23b61ec42473723b2fec2f33fb12558ff221ee551962f01dd4de9053c2055"
             ],
-            "version": "==4.0.2"
+            "version": "==4.1.0"
         },
         "pluggy": {
             "hashes": [
@@ -105,12 +112,26 @@
             ],
             "version": "==0.6.0"
         },
+        "protobuf": {
+            "hashes": [
+                "sha256:1fcb9b704bc2e30767352d86b2664d8f65f8ed49654d7a80e7a150739724e80a",
+                "sha256:36d871fa54ec039b9153e7cbae1fa52a7cfdcd8105e47fb7efc8292b131d0a5c",
+                "sha256:41c4555d9754b985352ce5289fa3ba6b21ed715f595111e46e2b90ca53112475",
+                "sha256:4d4815467f8a61b06d648699842b233017b201f7a16275d680ec5480f10e30e9",
+                "sha256:5b816951df388f4ab2adbd3f9ae5619b9a5d7033d14b005c345dc3ee88a7faf4",
+                "sha256:61dbf86993a9312c3a0816b5252079a3943856003bf0380fea3098c929084ad4",
+                "sha256:9f3be25ad48b051186ee88f9567a3f3f548facd360e0cb62568e2736d9cfda11",
+                "sha256:ef02609ef445987976a3a26bff77119c518e0915c96661c3a3b17856d0ef6374"
+            ],
+            "index": "pypi",
+            "version": "==3.4.0"
+        },
         "py": {
             "hashes": [
-                "sha256:29c9fab495d7528e80ba1e343b958684f4ace687327e6f789a94bf3d1915f881",
-                "sha256:983f77f3331356039fdd792e9220b7b8ee1aa6bd2b25f567a963ff1de5a64f6a"
+                "sha256:3fd59af7435864e1a243790d322d763925431213b6b8529c6ca71081ace3bbf7",
+                "sha256:e31fb2767eb657cbde86c454f02e99cb846d3cd9d61b318525140214fdc0e98e"
             ],
-            "version": "==1.5.3"
+            "version": "==1.5.4"
         },
         "pyblake2": {
             "hashes": [
@@ -128,18 +149,18 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:54713b26c97538db6ff0703a12b19aeaeb60b5e599de542e7fca0ec83b9038e8",
-                "sha256:829230122facf05a5f81a6d4dfe6454a04978ea3746853b2b84567ecf8e5c526"
+                "sha256:0453c8676c2bee6feb0434748b068d5510273a916295fd61d306c4f22fbfd752",
+                "sha256:4b208614ae6d98195430ad6bde03641c78553acee7c83cec2e85d613c0cd383d"
             ],
             "index": "pypi",
-            "version": "==3.5.1"
+            "version": "==3.6.3"
         },
         "requests": {
             "hashes": [
-                "sha256:6a1b267aa90cac58ac3a765d067950e7dbbf75b1da07e895d1f594193a40a38b",
-                "sha256:9c443e7324ba5b85070c4a818ade28bfabedf16ea10206da1132edaa6dda237e"
+                "sha256:63b52e3c866428a224f97cab011de738c36aec0185aa91cfacd418b5d58911d1",
+                "sha256:ec22d826a36ed72a7358ff3fe56cbd4ba69dd7a6718ffd450ff0e9df7a47ce6a"
             ],
-            "version": "==2.18.4"
+            "version": "==2.19.1"
         },
         "six": {
             "hashes": [
@@ -164,10 +185,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
-                "sha256:cc44da8e1145637334317feebd728bd869a35285b93cbb4cca2577da7e62db4f"
+                "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
+                "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
             ],
-            "version": "==1.22"
+            "version": "==1.23"
         }
     },
     "develop": {}