diff --git a/lib/inertia_rails/configuration.rb b/lib/inertia_rails/configuration.rb
index 870adbf..64cca04 100644
--- a/lib/inertia_rails/configuration.rb
+++ b/lib/inertia_rails/configuration.rb
@@ -18,7 +18,7 @@ class Configuration
 
       # SSR options.
       ssr_enabled: false,
-      ssr_url: 'http://localhost:13714',
+      ssr_url: ENV.fetch('INERTIA_SSR_URL', 'http://localhost:13714'),
 
       # Used to detect version drift between server and client.
       version: nil,