diff --git a/mix.exs b/mix.exs
index d45e6e3..b1b9073 100644
--- a/mix.exs
+++ b/mix.exs
@@ -61,11 +61,9 @@ defmodule Astarte.Core.Mixfile do
       {:ecto, "~> 3.4"},
       {:ecto_morph, "~> 0.1.23"},
       {:exprotobuf, "~> 1.2"},
-      # Lock gpb to 4.12.0 until this is solved https://github.com/bitwalker/exprotobuf/issues/113
-      {:gpb, "~> 4.12.0"},
       {:jason, "~> 1.2"},
       {:elixir_uuid, "~> 1.2"},
-      {:excoveralls, "~> 0.12", only: :test},
+      {:excoveralls, "~> 0.15", only: :test},
       {:ex_doc, ">= 0.0.0", only: :dev, runtime: false},
       {:dialyzex, github: "Comcast/dialyzex", only: [:dev, :ci]}
     ]
diff --git a/mix.lock b/mix.lock
index d435931..dc19437 100644
--- a/mix.lock
+++ b/mix.lock
@@ -8,9 +8,9 @@
   "ecto_morph": {:hex, :ecto_morph, "0.1.23", "38da498397e239571b0f75511b01248a2f30b2b718c7be58a9d8657834cd70d4", [:mix], [{:ecto, ">= 3.0.3", [hex: :ecto, repo: "hexpm", optional: false]}], "hexpm", "41eeea147fd493822c13d99a9bbfda0e758e24183c3fe229343efa21b8e7343d"},
   "elixir_uuid": {:hex, :elixir_uuid, "1.2.1", "dce506597acb7e6b0daeaff52ff6a9043f5919a4c3315abb4143f0b00378c097", [:mix], [], "hexpm", "f7eba2ea6c3555cea09706492716b0d87397b88946e6380898c2889d68585752"},
   "ex_doc": {:hex, :ex_doc, "0.24.1", "15673de99154f93ca7f05900e4e4155ced1ee0cd34e0caeee567900a616871a4", [:mix], [{:earmark_parser, "~> 1.4.0", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "07972f17bdf7dc7b5bd76ec97b556b26178ed3f056e7ec9288eb7cea7f91cce2"},
-  "excoveralls": {:hex, :excoveralls, "0.14.0", "4b562d2acd87def01a3d1621e40037fdbf99f495ed3a8570dfcf1ab24e15f76d", [:mix], [{:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "94f17478b0cca020bcd85ce7eafea82d2856f7ed022be777734a2f864d36091a"},
+  "excoveralls": {:hex, :excoveralls, "0.15.0", "ac941bf85f9f201a9626cc42b2232b251ad8738da993cf406a4290cacf562ea4", [:mix], [{:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "9631912006b27eca30a2f3c93562bc7ae15980afb014ceb8147dc5cdd8f376f1"},
   "exprotobuf": {:hex, :exprotobuf, "1.2.17", "3003937da617f588a8fb63ebdd7b127a18d78d6502623c272076fd54c07c4de1", [:mix], [{:gpb, "~> 4.0", [hex: :gpb, repo: "hexpm", optional: false]}], "hexpm", "e07ec1e5ae6f8c1c8521450d5f6b658c8c700b1f34c70356e91ece0766f4361a"},
-  "gpb": {:hex, :gpb, "4.12.0", "4a5224c046b1cd91fb23b81a8a450cb4435016c1f2c96af71f0a90476a11dcaf", [:make, :rebar], [], "hexpm", "de6c947a2308c52941bab0b168e0aadca146c26678a330698865d222a3621125"},
+  "gpb": {:hex, :gpb, "4.19.6", "c4ea22623a1bc143150790ef1d426bf537e9456b548e2ad986295822eb55d910", [:make, :rebar3], [], "hexpm", "91bbd70dd4ad0122cee360d8a126afd64191eafa95fd7dbbedc6685a0b25cb2e"},
   "hackney": {:hex, :hackney, "1.17.4", "99da4674592504d3fb0cfef0db84c3ba02b4508bae2dff8c0108baa0d6e0977c", [:rebar3], [{:certifi, "~>2.6.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~>6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~>1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.3.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~>1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "de16ff4996556c8548d512f4dbe22dd58a587bf3332e7fd362430a7ef3986b16"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
   "jason": {:hex, :jason, "1.2.2", "ba43e3f2709fd1aa1dce90aaabfd039d000469c05c56f0b8e31978e03fa39052", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "18a228f5f0058ee183f29f9eae0805c6e59d61c3b006760668d8d18ff0d12179"},