This code is also licensed to the PSF under a Contributor Agreement.

CHANGES.txt

 Version 3.0.7 released 2013-10-11
 
 * NOTE: this release only changes the license.
-* simplejson is now dual-licensed software, MIT or AFL v2.1.
+* simplejson is now dual-licensed software, MIT or AFL v2.1. It is
+  also made explicit that this code is also licensed to the PSF under
+  a Contributor Agreement.
 
 Version 3.0.6 released 2013-01-11
 

LICENSE.txt

 simplejson is dual-licensed software. It is available under the terms
 of the MIT license, or the Academic Free License version 2.1. The full
-text of each license agreement is included below.
+text of each license agreement is included below. This code is also
+licensed to the Python Software Foundation (PSF) under a Contributor
+Agreement.
 
 MIT License
 ===========