diff --git a/lib/mpl3115a2.ex b/lib/mpl3115a2.ex
index afe0eee..6a7a402 100644
--- a/lib/mpl3115a2.ex
+++ b/lib/mpl3115a2.ex
@@ -172,8 +172,7 @@ defmodule MPL3115A2 do
     with {:ok, <<msb>>} <- Registers.read_out_p_msb(conn),
          {:ok, <<csb>>} <- Registers.read_out_p_csb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_p_lsb(conn),
-         {:ok, altitude} <- to_altitude(<<msb, csb, lsb>>),
-         do: {:ok, altitude}
+         do: to_altitude(<<msb, csb, lsb>>)
   end
 
   @doc """
@@ -184,8 +183,7 @@ defmodule MPL3115A2 do
     with {:ok, <<msb>>} <- Registers.read_out_p_msb(conn),
          {:ok, <<csb>>} <- Registers.read_out_p_csb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_p_lsb(conn),
-         {:ok, pressure} <- to_pressure(<<msb, csb, lsb>>),
-         do: {:ok, pressure}
+         do: to_pressure(<<msb, csb, lsb>>)
   end
 
   @doc """
@@ -195,8 +193,7 @@ defmodule MPL3115A2 do
   def temperature(%MPL3115A2{conn: conn}) do
     with {:ok, <<msb>>} <- Registers.read_out_t_msb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_t_lsb(conn),
-         {:ok, temperature} <- to_temperature(<<msb, lsb>>),
-         do: {:ok, temperature}
+         do: to_temperature(<<msb, lsb>>)
   end
 
   @doc """
@@ -207,8 +204,7 @@ defmodule MPL3115A2 do
     with {:ok, <<msb>>} <- Registers.read_out_p_delta_msb(conn),
          {:ok, <<csb>>} <- Registers.read_out_p_delta_csb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_p_delta_lsb(conn),
-         {:ok, altitude} <- to_altitude(<<msb, csb, lsb>>),
-         do: {:ok, altitude}
+         do: to_altitude(<<msb, csb, lsb>>)
   end
 
   @doc """
@@ -219,8 +215,7 @@ defmodule MPL3115A2 do
     with {:ok, <<msb>>} <- Registers.read_out_p_delta_msb(conn),
          {:ok, <<csb>>} <- Registers.read_out_p_delta_csb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_p_delta_lsb(conn),
-         {:ok, pressure} <- to_pressure(<<msb, csb, lsb>>),
-         do: {:ok, pressure}
+         do: to_pressure(<<msb, csb, lsb>>)
   end
 
   @doc """
@@ -230,8 +225,7 @@ defmodule MPL3115A2 do
   def temperature_delta(%MPL3115A2{conn: conn}) do
     with {:ok, <<msb>>} <- Registers.read_out_t_delta_msb(conn),
          {:ok, <<lsb>>} <- Registers.read_out_t_delta_lsb(conn),
-         {:ok, temperature} <- to_temperature_delta(<<msb, lsb>>),
-         do: {:ok, temperature}
+         do: to_temperature_delta(<<msb, lsb>>)
   end
 
   @doc """
diff --git a/mix.lock b/mix.lock
index 745ff9e..68523e7 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,15 +1,16 @@
 %{
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm", "7af5c7e09fe1d40f76c8e4f9dd2be7cebd83909f31fee7cd0e9eadc567da8353"},
   "circuits_i2c": {:hex, :circuits_i2c, "1.0.0", "0b9c686ff5075f9364209fef62f6b5162eeb41a0061571f52f02637b40ca37fe", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "f80efc49235e7819b9ea8e82c7dbd5e2523c65d8e3d4f46f89dfd43217a3f4f7"},
-  "credo": {:hex, :credo, "1.1.5", "caec7a3cadd2e58609d7ee25b3931b129e739e070539ad1a0cd7efeeb47014f4", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "d0bbd3222607ccaaac5c0340f7f525c627ae4d7aee6c8c8c108922620c5b6446"},
+  "credo": {:hex, :credo, "1.6.1", "7dc76dcdb764a4316c1596804c48eada9fff44bd4b733a91ccbf0c0f368be61e", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "698607fb5993720c7e93d2d8e76f2175bba024de964e160e2f7151ef3ab82ac5"},
   "earmark": {:hex, :earmark, "1.4.13", "2c6ce9768fc9fdbf4046f457e207df6360ee6c91ee1ecb8e9a139f96a4289d91", [:mix], [{:earmark_parser, ">= 1.4.12", [hex: :earmark_parser, repo: "hexpm", optional: false]}], "hexpm", "a0cf3ed88ef2b1964df408889b5ecb886d1a048edde53497fc935ccd15af3403"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.12", "b245e875ec0a311a342320da0551da407d9d2b65d98f7a9597ae078615af3449", [:mix], [], "hexpm", "711e2cc4d64abb7d566d43f54b78f7dc129308a63bc103fbd88550d2174b3160"},
   "elixir_ale": {:hex, :elixir_ale, "1.2.1", "07ac2f17a0191b8bd3b0df6b526c7f699a3a4d690c9def573fcb5824eef24d98", [:make, :mix], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "bfb099137500a3b8c4a1750cf07f2d704897ef9feac3412064bf9edc7d74193c"},
   "elixir_make": {:hex, :elixir_make, "0.6.3", "bc07d53221216838d79e03a8019d0839786703129599e9619f4ab74c8c096eac", [:mix], [], "hexpm", "f5cbd651c5678bcaabdbb7857658ee106b12509cd976c2c2fca99688e1daf716"},
   "ex_doc": {:hex, :ex_doc, "0.23.0", "a069bc9b0bf8efe323ecde8c0d62afc13d308b1fa3d228b65bca5cf8703a529d", [:mix], [{:earmark_parser, "~> 1.4.0", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}], "hexpm", "f5e2c4702468b2fd11b10d39416ddadd2fcdd173ba2a0285ebd92c39827a5a16"},
+  "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "git_cli": {:hex, :git_cli, "0.3.0", "a5422f9b95c99483385b976f5d43f7e8233283a47cda13533d7c16131cb14df5", [:mix], [], "hexpm", "78cb952f4c86a41f4d3511f1d3ecb28edb268e3a7df278de2faa1bd4672eaf9b"},
   "git_ops": {:hex, :git_ops, "2.3.0", "a77f91b810d874e1abf5f415f335959a2dfc3613cbcd28c7c05b97c666339fda", [:mix], [{:git_cli, "~> 0.2", [hex: :git_cli, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.0", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "849bd53b7992963b3fdfebcdd0c946f4aab3f6ffbcfa5668b3e83cd5aeca0a2f"},
-  "jason": {:hex, :jason, "1.1.2", "b03dedea67a99223a2eaf9f1264ce37154564de899fd3d8b9a21b1a6fd64afe7", [:mix], [{:decimal, "~> 1.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fdf843bca858203ae1de16da2ee206f53416bbda5dc8c9e78f43243de4bc3afe"},
+  "jason": {:hex, :jason, "1.2.2", "ba43e3f2709fd1aa1dce90aaabfd039d000469c05c56f0b8e31978e03fa39052", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "18a228f5f0058ee183f29f9eae0805c6e59d61c3b006760668d8d18ff0d12179"},
   "makeup": {:hex, :makeup, "1.0.5", "d5a830bc42c9800ce07dd97fa94669dfb93d3bf5fcf6ea7a0c67b2e0e4a7f26c", [:mix], [{:nimble_parsec, "~> 0.5 or ~> 1.0", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cfa158c02d3f5c0c665d0af11512fed3fba0144cf1aadee0f2ce17747fba2ca9"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.15.0", "98312c9f0d3730fde4049985a1105da5155bfe5c11e47bdc7406d88e01e4219b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.1", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "75ffa34ab1056b7e24844c90bfc62aaf6f3a37a15faa76b07bc5eba27e4a8b4a"},
   "mimic": {:hex, :mimic, "1.1.3", "3bad83d5271b4faa7bbfef587417a6605cbbc802a353395d446a1e5f46fe7115", [:mix], [], "hexpm", "0d93cb8fcd00a1013bae56050755879050bb9b8ef0c3d51b6fec5a2f1fc33d66"},