README.md in onebox-1.8.39 vs README.md in onebox-1.8.40

@@ -74,10 +74,10 @@
 Ruby Support
 ------------
 
 The onebox library is supported on all "officially" supported versions of Ruby.
 
-This means you must be on Ruby 2.2 or above for it to work.
+This means you must be on Ruby 2.3 or above for it to work.
 
 Development Preview Interface
 -----------------------------
 
 The onebox gem comes with a development server for previewing the results