README.md in unicode-blocks-1.2.0 vs README.md in unicode-blocks-1.2.1

@@ -2,10 +2,12 @@
 
 Each unicode character belongs to a [block](https://en.wikipedia.org/wiki/Unicode_block). This gem returns the all blocks asociated with the given string.
 
 Unicode version: **10.0.0**
 
-Supported Rubies: **2.4**, **2.3**, **2.2**, **2.1**
+Supported Rubies: **2.5**, **2.4**, **2.3**
+
+Old Rubies that might still work: **2.2**, **2.1**, **2.0**
 
 ## Gemfile
 
 ```ruby
 gem "unicode-blocks"