diff --git a/.gitignore b/.gitignore
index 17ad288..e680f6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ erl_crash.dump
 at_ex-*.tar
 .elixir_ls/
 
+/config/dev.exs
\ No newline at end of file
diff --git a/config/dev.exs b/config/dev.sample.exs
similarity index 79%
rename from config/dev.exs
rename to config/dev.sample.exs
index ea82f64..6131908 100644
--- a/config/dev.exs
+++ b/config/dev.sample.exs
@@ -3,7 +3,7 @@
 use Mix.Config
 
 config :at_ex,
-  api_key: "6f2a021cbd7b2b0f5e9ba324f42dbf42403ab9a239d1c55c5a68cf54922bda77",
+  api_key: "===INSERT AFRICAS_TALKING_API_KEY HERE ===",
   content_type: "application/x-www-form-urlencoded",
   accept: "application/json",
   auth_token: "",