diff --git a/mix.exs b/mix.exs
index 31eae4c..4dfd02f 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,9 +5,9 @@ defmodule Mandrill.Mixfile do
     [ app: :mandrill,
       version: "0.5.0",
       elixir: "~> 1.0",
-      description: description,
-      package: package,
-      deps: deps ]
+      description: description(),
+      package: package(),
+      deps: deps() ]
   end
 
   def application do
@@ -17,10 +17,10 @@ defmodule Mandrill.Mixfile do
 
   defp deps do
     [
-      { :httpoison, "~> 0.6" },
-      { :exjsx, "~> 3.2.0", app: false },
-      { :ex_doc, "~> 0.6.1", only: :docs },
-      { :earmark, "~> 0.1.12", only: :docs }
+      {:httpoison, "~> 1.2"},
+      {:exjsx, "~> 4.0", app: false},
+      {:ex_doc, "~> 0.6.1", only: :docs },
+      {:earmark, "~> 0.1.12", only: :docs }
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index 3ba65f5..9032f24 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,8 +1,16 @@
-%{"earmark": {:hex, :earmark, "0.1.13"},
-  "ex_doc": {:hex, :ex_doc, "0.6.2"},
-  "exjsx": {:hex, :exjsx, "3.2.0"},
-  "hackney": {:hex, :hackney, "1.0.6"},
-  "httpoison": {:hex, :httpoison, "0.6.2"},
-  "idna": {:hex, :idna, "1.0.2"},
-  "jsx": {:hex, :jsx, "2.6.2"},
-  "ssl_verify_hostname": {:hex, :ssl_verify_hostname, "1.0.1"}}
+%{
+  "certifi": {:hex, :certifi, "2.3.1", "d0f424232390bf47d82da8478022301c561cf6445b5b5fb6a84d49a9e76d2639", [:rebar3], [{:parse_trans, "3.2.0", [hex: :parse_trans, optional: false]}]},
+  "earmark": {:hex, :earmark, "0.1.13", "b6b865e874d0632998d282b1b1d0747dd8d2a83bef018cb9c3cfe1ad5e0cfa76", [:mix], []},
+  "ex_doc": {:hex, :ex_doc, "0.6.2", "e51e39a1274201c753754fafd640be217568d552d2a70a2bb69b93d335eb027b", [:mix], []},
+  "exjsx": {:hex, :exjsx, "4.0.0", "60548841e0212df401e38e63c0078ec57b33e7ea49b032c796ccad8cde794b5c", [:mix], [{:jsx, "~> 2.8.0", [hex: :jsx, optional: false]}]},
+  "hackney": {:hex, :hackney, "1.13.0", "24edc8cd2b28e1c652593833862435c80661834f6c9344e84b6a2255e7aeef03", [:rebar3], [{:certifi, "2.3.1", [hex: :certifi, optional: false]}, {:idna, "5.1.2", [hex: :idna, optional: false]}, {:metrics, "1.0.1", [hex: :metrics, optional: false]}, {:mimerl, "1.0.2", [hex: :mimerl, optional: false]}, {:ssl_verify_fun, "1.1.1", [hex: :ssl_verify_fun, optional: false]}]},
+  "httpoison": {:hex, :httpoison, "1.2.0", "2702ed3da5fd7a8130fc34b11965c8cfa21ade2f232c00b42d96d4967c39a3a3", [:mix], [{:hackney, "~> 1.8", [hex: :hackney, optional: false]}]},
+  "idna": {:hex, :idna, "5.1.2", "e21cb58a09f0228a9e0b95eaa1217f1bcfc31a1aaa6e1fdf2f53a33f7dbd9494", [:rebar3], [{:unicode_util_compat, "0.3.1", [hex: :unicode_util_compat, optional: false]}]},
+  "jsx": {:hex, :jsx, "2.8.3", "a05252d381885240744d955fbe3cf810504eb2567164824e19303ea59eef62cf", [:mix, :rebar3], []},
+  "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], []},
+  "mimerl": {:hex, :mimerl, "1.0.2", "993f9b0e084083405ed8252b99460c4f0563e41729ab42d9074fd5e52439be88", [:rebar3], []},
+  "parse_trans": {:hex, :parse_trans, "3.2.0", "2adfa4daf80c14dc36f522cf190eb5c4ee3e28008fc6394397c16f62a26258c2", [:rebar3], []},
+  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.1", "28a4d65b7f59893bc2c7de786dec1e1555bd742d336043fe644ae956c3497fbe", [:make, :rebar], []},
+  "ssl_verify_hostname": {:hex, :ssl_verify_hostname, "1.0.1", "e6ef428c350d1b7e9c534c0929caae1ecb47c22f88cbbb880e07e46918380cc5", [:make], []},
+  "unicode_util_compat": {:hex, :unicode_util_compat, "0.3.1", "a1f612a7b512638634a603c8f401892afbf99b8ce93a45041f8aaca99cadb85e", [:rebar3], []},
+}