Gemfile.5.2.mysql2 in gemika-0.4.1 vs Gemfile.5.2.mysql2 in gemika-0.5.0

@@ -4,10 +4,10 @@
 ruby '>= 2.2'
 
 # Runtime dependencies
 gem 'activerecord', '~>5.2.0'
 gem 'rspec', '~>3.5'
-gem 'mysql2', '~>0.4.4'
+gem 'mysql2'
 
 # Development dependencies
 gem 'rake'
 gem 'database_cleaner'
 gem 'pry'