ChangeLog.md in amq-protocol-2.1.0 vs ChangeLog.md in amq-protocol-2.2.0

@@ -1,5 +1,19 @@
-## Changes between 2.0.0 and 2.1.0
+## Changes between 2.1.0 and 2.2.0 (unreleased)
+
+### Timestamps are Encoded as 64-bit Unsigned Integers
+
+This is a potentially **breaking change**. It is recommended that
+all applications that use this gem and pass date/time values in message
+properties or headers are upgraded at the same time.
+
+GitHub issue: [#64](https://github.com/ruby-amqp/amq-protocol/issues/64).
+
+Contributed by Carl Hoerberg.
+
+
+
+## Changes between 2.0.0 and 2.1.0 (January 28th, 2017)
 
 ### Ruby Warnings Squashed
 
 Contributed by Akira Matsuda.