rails51.gemfile in audited-5.1.0

- old
+ new

@@ -4,7 +4,8 @@
 
 gem "rails", "~> 5.1.4"
 gem "mysql2", ">= 0.3.18", "< 0.6.0"
 gem "pg", ">= 0.18", "< 2.0"
 gem "sqlite3", "~> 1.3.6"
+gem "psych", "~> 3.1"
 
 gemspec name: "audited", path: "../"