diff --git a/config/database.yml b/config/database.yml
index c0aa203..7b5fcd6 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -19,8 +19,6 @@ development:
   encoding: unicode
   database: ruby-rails-sample_development
   pool: 5
-  username: ruby-rails-sample
-  password:
 
   # Connect on a TCP socket. Omitted by default since the client uses a
   # domain socket that doesn't need configuration. Windows does not have
@@ -48,13 +46,9 @@ test:
   encoding: unicode
   database: ruby-rails-sample_test
   pool: 5
-  username: ruby-rails-sample
-  password:
 
 production:
   adapter: postgresql
   encoding: unicode
   database: ruby-rails-sample_production
   pool: 5
-  username: ruby-rails-sample
-  password: