README.md in unicode-numeric_value-1.3.0 vs README.md in unicode-numeric_value-1.3.1

@@ -2,10 +2,12 @@
 
 Convert a Unicode character into its numeric value.
 
 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-numeric_value"