diff --git a/config/dev.exs b/config/dev.exs
index 0053778..1f62470 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -3,6 +3,7 @@ import Config
 config :tesla, adapter: Tesla.Adapter.Hackney
 
 config :acme_client,
-  directory_url: System.get_env("DIRECTORY_URL") || "https://acme-staging-v02.api.letsencrypt.org/directory",
+  directory_url:
+    System.get_env("DIRECTORY_URL") || "https://acme-staging-v02.api.letsencrypt.org/directory",
   account_key: System.get_env("ACCOUNT_KEY"),
   account_kid: System.get_env("ACCOUNT_KID")