diff --git a/lib/novu/client.rb b/lib/novu/client.rb
index 66e8353..18f0ca2 100644
--- a/lib/novu/client.rb
+++ b/lib/novu/client.rb
@@ -67,7 +67,7 @@ def initialize(access_token: nil, idempotency_key: nil, enable_retry: false, ret
       @initial_delay = retry_config[:initial_delay]
       @max_delay = retry_config[:max_delay]
 
-      self.base_uri = backend_url
+      self.class.base_uri(backend_url)
 
       self.class.default_options.merge!(headers: { 
 					"Authorization" => "ApiKey #{@access_token}",