diff --git a/README.md b/README.md
index c543059..6dc882f 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ If you have found the source code before finding the geocache, consider it a hin
 
 Building:
 ```bash
+export MIX_ENV=prod && export MIX_TARGET=<device>
 cd ui/assets && npm install
 cd ../ && mix phx.digest
 cd ../firmware && mix deps.get
@@ -20,12 +21,9 @@ mix firmware.burn # After inserting SD card
 ```
 
 ## Setting morse code
-Still have to find out how to correctly set secrets... so I have to do it manually now.
-
-```bash
-ssh nerves.local
-```
-
+To set the morse code, create a new file under firmware/config, called secrets.exs:
 ```elixir
-System.set_env("MORSE_MESSAGE", "...---...")
+use Mix.Config
+
+config :morse, :morse_message, "...---..."
 ```
diff --git a/firmware/config/secrets.exs b/firmware/config/secrets.exs
new file mode 100644
index 0000000..3c4c754
--- /dev/null
+++ b/firmware/config/secrets.exs
@@ -0,0 +1,3 @@
+use Mix.Config
+
+config :morse, :morse_message, "................"
diff --git a/firmware/config/target.exs b/firmware/config/target.exs
index d0b2ab0..f5c8fda 100644
--- a/firmware/config/target.exs
+++ b/firmware/config/target.exs
@@ -37,6 +37,10 @@ config :nerves_init_gadget,
   node_name: node_name,
   node_host: :mdns_domain
 
+if File.exists?("config/secrets.exs") do
+  import_config "secrets.exs"
+end
+
 # Import target specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 # Uncomment to use target specific configurations
diff --git a/morse/.gitignore b/morse/.gitignore
index 2f07eac..d2ca612 100644
--- a/morse/.gitignore
+++ b/morse/.gitignore
@@ -21,4 +21,3 @@ erl_crash.dump
 
 # Ignore package tarball (built via "mix hex.build").
 morse-*.tar
-
diff --git a/morse/lib/morse.ex b/morse/lib/morse.ex
index e921788..3131b2c 100644
--- a/morse/lib/morse.ex
+++ b/morse/lib/morse.ex
@@ -21,12 +21,7 @@ defmodule Morse do
   """
 
   def signal do
-    case System.get_env("MORSE_MESSAGE") do
-      nil ->
-        # Signal for SOS if the env variable wasn't found :)
-        signal("...---...")
-      message -> signal(message)
-    end
+    signal(Application.fetch_env!(:morse, :morse_message))
   end
 
   def signal(symbols) do
diff --git a/morse/mix.exs b/morse/mix.exs
index 9232c4c..a4345bf 100644
--- a/morse/mix.exs
+++ b/morse/mix.exs
@@ -14,7 +14,8 @@ defmodule Morse.MixProject do
   # Run "mix help compile.app" to learn about applications.
   def application do
     [
-      extra_applications: [:logger]
+      extra_applications: [:logger],
+      env: [morse_message: "...---..."]
     ]
   end
 
diff --git a/ui/.gitignore b/ui/.gitignore
index a52507c..2a3a776 100644
--- a/ui/.gitignore
+++ b/ui/.gitignore
@@ -32,3 +32,5 @@ npm-debug.log
 # we ignore priv/static. You may want to comment
 # this depending on your deployment strategy.
 /priv/static/
+
+config/secrets.exs