CHANGES.md in twilio-ruby-5.1.1 vs CHANGES.md in twilio-ruby-5.1.2

@@ -1,7 +1,24 @@
 twilio-ruby changelog
 =====================
 
+[2017-08-18] Version 5.1.2
+---------------------------
+**Api**
+- Add VoiceReceiveMode {'voice', 'fax'} option to IncomingPhoneNumber UPDATE requests
+
+**Chat**
+- Add channel message media information
+- Add service instance message media information
+
+**Preview**
+- Removed 'email' from bulk_exports configuration api [bi]. No migration plan needed because api has not been used yet.
+- Add DeployedDevices.
+
+**Sync**
+- Add support for Service Instance unique names
+
+
 [2017-08-10] Version 5.1.1
 ---------------------------
 **Library**
 - Don't override Faraday default param encoder. Thanks to @isaacseymour. PR #309
 - Fix incorrectly aliased `to_xml` on TwiML classes. Thanks to @philnash. PR #318