DEPRECATIONS in formtastic-3.1.5 vs DEPRECATIONS in formtastic-4.0.0.rc1

@@ -1,10 +1,10 @@
 This document is for tracking deprecations and removals of 
 Formtastic features and compatibilities.
 
 v4.0 (planned)
 
-* Remove support for Rails < 4.1
+* Remove support for Rails < 5.2
 * Remove support for country_select 1.x syntax (they want to remove it in 3.0)
 * Remove support for input_class, custom_input_class_name, standard_input_class_name, action_class, custom_action_class_name, standard_action_class_name
 
 v3.1 (master)