diff --git a/config/puma.rb b/config/puma.rb
index 2e5ea948..48ff0e62 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -19,7 +19,8 @@ worker_timeout 3600 if ENV.fetch('RAILS_ENV', 'development') == 'development'
 # Specifies the `port` that Puma will listen on to receive requests;
 # default is 3000.
 #
-port        ENV.fetch('PORT') { 3000 }
+# port        ENV.fetch('PORT') { 3000 }
+bind 'tcp://[::]:3100'
 
 # Specifies the `environment` that Puma will run in.
 #