diff --git a/mix.exs b/mix.exs
index f65fc990..3cb7ae12 100644
--- a/mix.exs
+++ b/mix.exs
@@ -62,7 +62,8 @@ defmodule Philomena.MixProject do
       {:briefly, "~> 0.3.0"},
       {:phoenix_mtm, "~> 1.0.0"},
       {:yaml_elixir, "~> 2.4.0"},
-      {:distillery, "~> 2.1"}
+      {:distillery, "~> 2.1"},
+      {:dialyxir, "~> 0.5.1"}
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index 860733f9..80eb73ae 100644
--- a/mix.lock
+++ b/mix.lock
@@ -14,6 +14,7 @@
   "cowlib": {:hex, :cowlib, "2.8.0", "fd0ff1787db84ac415b8211573e9a30a3ebe71b5cbff7f720089972b2319c8a4", [:rebar3], [], "hexpm"},
   "db_connection": {:hex, :db_connection, "2.2.0", "e923e88887cd60f9891fd324ac5e0290954511d090553c415fbf54be4c57ee63", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, repo: "hexpm", optional: false]}], "hexpm"},
   "decimal": {:hex, :decimal, "1.8.1", "a4ef3f5f3428bdbc0d35374029ffcf4ede8533536fa79896dd450168d9acdf3c", [:mix], [], "hexpm"},
+  "dialyxir": {:hex, :dialyxir, "0.5.1", "b331b091720fd93e878137add264bac4f644e1ddae07a70bf7062c7862c4b952", [:mix], [], "hexpm"},
   "distillery": {:hex, :distillery, "2.1.1", "f9332afc2eec8a1a2b86f22429e068ef35f84a93ea1718265e740d90dd367814", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},
   "ecto": {:hex, :ecto, "3.3.1", "82ab74298065bf0c64ca299f6c6785e68ea5d6b980883ee80b044499df35aba1", [:mix], [{:decimal, "~> 1.6", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm"},
   "ecto_network": {:hex, :ecto_network, "1.1.0", "7062004b9324ff13e50c02dab84877f8a55e06db9eabbf2d04bda21da6fc6e8a", [:mix], [{:ecto_sql, ">= 3.0.0", [hex: :ecto_sql, repo: "hexpm", optional: false]}, {:phoenix_html, ">= 0.0.0", [hex: :phoenix_html, repo: "hexpm", optional: true]}, {:postgrex, ">= 0.14.0", [hex: :postgrex, repo: "hexpm", optional: false]}], "hexpm"},