gem lock

Gemfile

@@ -9,10 +9,10 @@ end
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.0'
 # Use mysql as the database for Active Record
-gem 'mysql2', '>= 0.3.18', '< 0.5'
+#gem 'mysql2', '>= 0.3.18', '< 0.5'
 
 #Use PosgreSQL
-#gem 'pg'
+gem 'pg'
 
 # redis server for cable
 gem 'redis', '~> 3.0'