diff --git a/README.md b/README.md
index fa18f46947..cab4e09b19 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ This is a tool for inspecting and analyzing the POA Network blockchain.
 
 To get POA Explorer up and running locally:
 
+  * Set up some default configuration with: `$ cp config/dev.secrets.esx.example config/dev.secrets.esx`
   * Install dependencies with `$ mix do deps.get, local.rebar, deps.compile, compile`
   * Create and migrate your database with `$ mix ecto.create && mix ecto.migrate`
   * Install Node.js dependencies with `$ cd assets && npm install && cd ..`
diff --git a/config/config.exs b/config/config.exs
index 1697693cbe..17ce79a7d7 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -15,7 +15,6 @@ config :explorer, ExplorerWeb.Gettext, locales: ~w(en), default_locale: "en"
 # Configures the endpoint
 config :explorer, ExplorerWeb.Endpoint,
   url: [host: "localhost"],
-  secret_key_base: "RMgI4C1HSkxsEjdhtGMfwAHfyT6CKWXOgzCboJflfSm4jeAlic52io05KB6mqzc5",
   render_errors: [view: ExplorerWeb.ErrorView, accepts: ~w(html json)],
   pubsub: [name: Explorer.PubSub, adapter: Phoenix.PubSub.PG2]
 
@@ -24,11 +23,11 @@ config :logger, :console,
   format: "$time $metadata[$level] $message\n",
   metadata: [:request_id]
 
+config :ethereumex,
+  scheme: "http",
+  host: "localhost",
+  port: 8545
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{Mix.env}.exs"
-
-config :ethereumex,
-  scheme: "https",
-  host: "sokol.poa.network",
-  port: 443
diff --git a/config/dev.exs b/config/dev.exs
index 7ab30a26bf..1e6b2f23b6 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -54,3 +54,5 @@ config :explorer, Explorer.Repo,
   database: "explorer_dev",
   hostname: "localhost",
   pool_size: 10
+
+import_config "dev.secret.exs"
diff --git a/config/dev.secret.exs.example b/config/dev.secret.exs.example
new file mode 100644
index 0000000000..160ca4b571
--- /dev/null
+++ b/config/dev.secret.exs.example
@@ -0,0 +1,11 @@
+use Mix.Config
+
+# Configure ethereumex
+config :ethereumex,
+  scheme: "http",
+  host: "localhost",
+  port: 8545
+
+# Configures the endpoint
+config :explorer, ExplorerWeb.Endpoint,
+  secret_key_base: "RMgI4C1HSkxsEjdhtGMfwAHfyT6CKWXOgzCboJflfSm4jeAlic52io05KB6mqzc5"
diff --git a/config/prod.exs b/config/prod.exs
index 88cc06ad5c..61da3fb889 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -35,3 +35,8 @@ config :explorer, Explorer.Repo,
 config :new_relixir,
   application_name: System.get_env("NEW_RELIC_APP_NAME"),
   license_key: System.get_env("NEW_RELIC_LICENSE_KEY")
+
+config :ethereumex,
+  scheme: System.get_env("ETHEREUM_SCHEME"),
+  host: System.get_env("ETHEREUM_HOST"),
+  port: System.get_env("ETHEREUM_PORT")
diff --git a/config/test.exs b/config/test.exs
index 0b76c4ca1d..7112416a1c 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -4,6 +4,7 @@ use Mix.Config
 # you can enable the server option below.
 config :explorer, ExplorerWeb.Endpoint,
   http: [port: 4001],
+  secret_key_base: "27Swe6KtEtmN37WyEYRjKWyxYULNtrxlkCEKur4qoV+Lwtk8lafsR16ifz1XBBYj",
   server: true
 
 config :explorer, :sql_sandbox, true
@@ -18,6 +19,13 @@ config :explorer, Explorer.Repo,
   hostname: "localhost",
   pool: Ecto.Adapters.SQL.Sandbox
 
+# Configure wallaby
 config :wallaby,
   screenshot_on_failure: true,
   chrome: [headless: false]
+
+# Configure ethereumex
+config :ethereumex,
+  scheme: "https",
+  host: "sokol.poa.network",
+  port: 443
diff --git a/mix.exs b/mix.exs
index e138485507..84a0292256 100644
--- a/mix.exs
+++ b/mix.exs
@@ -25,12 +25,14 @@ defmodule Explorer.Mixfile do
   end
 
   # Specifies which paths to compile per environment.
-  defp elixirc_paths(:test), do: ["lib", "test/support"]
-  defp elixirc_paths(_),     do: ["lib"]
+  defp elixirc_paths(:test), do: ["test/support" | elixirc_paths()]
+  defp elixirc_paths(_),     do: elixirc_paths()
+  defp elixirc_paths,        do: ["lib"]
 
   # Specifies extra applications to start per environment
-  defp extra_applications(:prod), do: [:ethereumex, :timex, :timex_ecto, :set_locale, :logger, :runtime_tools, :phoenix_pubsub_redis, :new_relixir]
-  defp extra_applications(_), do: [:ethereumex, :timex, :timex_ecto, :set_locale, :logger, :runtime_tools]
+  defp extra_applications(:prod), do: [:phoenix_pubsub_redis, :new_relixir | extra_applications()]
+  defp extra_applications(_), do: extra_applications()
+  defp extra_applications, do: [:ethereumex, :timex, :timex_ecto, :set_locale, :logger, :runtime_tools]
 
   # Specifies your project dependencies.
   #