diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6b21f5c..2af7dc5 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/elixir:1.6
+      - image: circleci/elixir:1.7
 
     working_directory: ~/repo
     steps:
diff --git a/c_src/Makefile b/c_src/Makefile
index 54dedc6..b880be9 100644
--- a/c_src/Makefile
+++ b/c_src/Makefile
@@ -2,7 +2,7 @@ ERLANG_PATH ?= $(shell erl -eval 'io:format("~s", [lists:concat([code:root_dir()
 CC           = g++
 CFLAGS       = -Wall -O3 -fpic -Wl,-undefined,dynamic_lookup -shared \
                -I$(ERLANG_PATH)/include -L$(ERLANG_PATH)/lib
-LIBS         = -lerts -ltensorflow
+LIBS         = -ltensorflow
 OBJDIR       = ../obj
 OUTDIR       = ../priv
 
diff --git a/mix.exs b/mix.exs
index 1ce210b..ca1d83d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,8 +5,8 @@ defmodule Extensor.MixProject do
     [
       app: :extensor,
       name: "Extensor",
-      version: "0.1.4",
-      elixir: "~> 1.6",
+      version: "0.1.5",
+      elixir: "~> 1.7",
       compilers: [:elixir_make] ++ Mix.compilers(),
       make_cwd: "c_src",
       make_clean: ["clean"],
@@ -40,10 +40,10 @@ defmodule Extensor.MixProject do
       {:matrex, "~> 0.6", optional: true},
       {:excoveralls, "~> 0.8", only: :test},
       {:elixir_make, "~> 0.4", runtime: false},
-      {:credo, "~> 0.8", only: [:dev, :test], runtime: false},
+      {:credo, "~> 0.10", only: [:dev, :test], runtime: false},
       {:dialyxir, "~> 0.5", only: [:dev], runtime: false},
       {:benchee, "~> 0.9", only: :dev, runtime: false},
-      {:ex_doc, "~> 0.18", only: :dev, runtime: false}
+      {:ex_doc, "~> 0.19", only: :dev, runtime: false}
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index 04f3e8f..c5b04a2 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,23 +1,26 @@
 %{
-  "benchee": {:hex, :benchee, "0.13.1", "bd93ca05be78bcb6159c7176230efeda2f724f7ffd485515175ca411dff4893e", [:mix], [{:deep_merge, "~> 0.1", [hex: :deep_merge, repo: "hexpm", optional: false]}], "hexpm"},
+  "benchee": {:hex, :benchee, "0.13.2", "30cd4ff5f593fdd218a9b26f3c24d580274f297d88ad43383afe525b1543b165", [:mix], [{:deep_merge, "~> 0.1", [hex: :deep_merge, repo: "hexpm", optional: false]}], "hexpm"},
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm"},
   "certifi": {:hex, :certifi, "2.3.1", "d0f424232390bf47d82da8478022301c561cf6445b5b5fb6a84d49a9e76d2639", [:rebar3], [{:parse_trans, "3.2.0", [hex: :parse_trans, repo: "hexpm", optional: false]}], "hexpm"},
-  "credo": {:hex, :credo, "0.9.3", "76fa3e9e497ab282e0cf64b98a624aa11da702854c52c82db1bf24e54ab7c97a", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:poison, ">= 0.0.0", [hex: :poison, repo: "hexpm", optional: false]}], "hexpm"},
-  "deep_merge": {:hex, :deep_merge, "0.1.1", "c27866a7524a337b6a039eeb8dd4f17d458fd40fbbcb8c54661b71a22fffe846", [:mix], [], "hexpm"},
+  "credo": {:hex, :credo, "0.10.0", "66234a95effaf9067edb19fc5d0cd5c6b461ad841baac42467afed96c78e5e9e", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
+  "deep_merge": {:hex, :deep_merge, "0.2.0", "c1050fa2edf4848b9f556fba1b75afc66608a4219659e3311d9c9427b5b680b3", [:mix], [], "hexpm"},
   "dialyxir": {:hex, :dialyxir, "0.5.1", "b331b091720fd93e878137add264bac4f644e1ddae07a70bf7062c7862c4b952", [:mix], [], "hexpm"},
   "earmark": {:hex, :earmark, "1.2.5", "4d21980d5d2862a2e13ec3c49ad9ad783ffc7ca5769cf6ff891a4553fbaae761", [:mix], [], "hexpm"},
   "elixir_make": {:hex, :elixir_make, "0.4.2", "332c649d08c18bc1ecc73b1befc68c647136de4f340b548844efc796405743bf", [:mix], [], "hexpm"},
-  "ex_doc": {:hex, :ex_doc, "0.18.4", "4406b8891cecf1352f49975c6d554e62e4341ceb41b9338949077b0d4a97b949", [:mix], [{:earmark, "~> 1.1", [hex: :earmark, repo: "hexpm", optional: false]}], "hexpm"},
-  "excoveralls": {:hex, :excoveralls, "0.9.1", "14fd20fac51ab98d8e79615814cc9811888d2d7b28e85aa90ff2e30dcf3191d6", [:mix], [{:hackney, ">= 0.12.0", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
+  "ex_doc": {:hex, :ex_doc, "0.19.1", "519bb9c19526ca51d326c060cb1778d4a9056b190086a8c6c115828eaccea6cf", [:mix], [{:earmark, "~> 1.1", [hex: :earmark, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.7", [hex: :makeup_elixir, repo: "hexpm", optional: false]}], "hexpm"},
+  "excoveralls": {:hex, :excoveralls, "0.9.2", "299ea4903be7cb2959af0f919d258af116736ca8d507f86c12ef2184698e21a0", [:mix], [{:hackney, ">= 0.12.0", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
   "exprotobuf": {:hex, :exprotobuf, "1.2.9", "f3cac1b0d0444da3c72cdfe80e394d721275dc80b1d7703ead9dad9267e93822", [:mix], [{:gpb, "~> 3.24", [hex: :gpb, repo: "hexpm", optional: false]}], "hexpm"},
   "google_protos": {:hex, :google_protos, "0.1.0", "c6b9e12092d17571b093d4156d004494ca143b65dbbcbfc3ffff463ea03467c0", [:mix], [{:protobuf, "~> 0.5", [hex: :protobuf, repo: "hexpm", optional: false]}], "hexpm"},
   "gpb": {:hex, :gpb, "3.28.1", "6849b2f0004dc4e7644f4f67e7cdd18e893f0ab87eb7ad82b9cb1483ce60eed0", [:make, :rebar], [], "hexpm"},
   "hackney": {:hex, :hackney, "1.13.0", "24edc8cd2b28e1c652593833862435c80661834f6c9344e84b6a2255e7aeef03", [:rebar3], [{:certifi, "2.3.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "5.1.2", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "1.0.2", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.1", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm"},
   "idna": {:hex, :idna, "5.1.2", "e21cb58a09f0228a9e0b95eaa1217f1bcfc31a1aaa6e1fdf2f53a33f7dbd9494", [:rebar3], [{:unicode_util_compat, "0.3.1", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm"},
   "jason": {:hex, :jason, "1.1.1", "d3ccb840dfb06f2f90a6d335b536dd074db748b3e7f5b11ab61d239506585eb2", [:mix], [{:decimal, "~> 1.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm"},
+  "makeup": {:hex, :makeup, "0.5.1", "966c5c2296da272d42f1de178c1d135e432662eca795d6dc12e5e8787514edf7", [:mix], [{:nimble_parsec, "~> 0.2.2", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm"},
+  "makeup_elixir": {:hex, :makeup_elixir, "0.8.0", "1204a2f5b4f181775a0e456154830524cf2207cf4f9112215c05e0b76e4eca8b", [:mix], [{:makeup, "~> 0.5.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 0.2.2", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm"},
   "matrex": {:hex, :matrex, "0.6.7", "cbbd65b58b333e456681c345e009b637b7d40cdb38b7fae3ceee407fa8e69321", [:make], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm"},
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm"},
   "mimerl": {:hex, :mimerl, "1.0.2", "993f9b0e084083405ed8252b99460c4f0563e41729ab42d9074fd5e52439be88", [:rebar3], [], "hexpm"},
+  "nimble_parsec": {:hex, :nimble_parsec, "0.2.2", "d526b23bdceb04c7ad15b33c57c4526bf5f50aaa70c7c141b4b4624555c68259", [:mix], [], "hexpm"},
   "parse_trans": {:hex, :parse_trans, "3.2.0", "2adfa4daf80c14dc36f522cf190eb5c4ee3e28008fc6394397c16f62a26258c2", [:rebar3], [], "hexpm"},
   "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], [], "hexpm"},
   "protobuf": {:hex, :protobuf, "0.5.4", "2e1b8eec211aff034ad8a14e3674220b0158bfb9a3c7128ac9d2a1ed1b3724d3", [:mix], [], "hexpm"},