diff --git a/config/initializers/letsencrypt.rb b/config/initializers/letsencrypt.rb
new file mode 100644
index 0000000..fa70319
--- /dev/null
+++ b/config/initializers/letsencrypt.rb
@@ -0,0 +1,15 @@
+LetsEncrypt.config do |config|
+  # Using Let's Encrypt staging server or not
+  # Default only `Rails.env.production? == true` will use Let's Encrypt production server.
+  config.use_staging = false
+
+  # Set the private key path
+  # Default is locate at config/letsencrypt.key
+  config.private_key_path = Rails.root.join('config', 'letsencrypt.key')
+
+  # Use environment variable to set private key
+  # If enable, the API Client will use `LETSENCRYPT_PRIVATE_KEY` as private key
+  # Default is false
+  config.use_env_key = false
+
+end