On August 7, 2015, United States Citizenship and Immigration Services published updates to the following forms:
• I-864, Affidavit of Support Under Section 213A of the Act,
• I-864A, Contract Between Sponsor and Household Member
• I-864EZ, Affidavit of Support Under Section 213A of the Act
• I-864W, Intending Immigrant’s Affidavit of Support Exemption
Each updated form is a new edition dated 07/02/15.  USCIS will continue to accept the 03/22/13 editions until 10/05/15. Starting 10/06/15, USCIS will only accept the 07/02/15 editions.  The edition date can be found at the bottom of the page on the Form and Instructions.

In addition, USCIS updated the corresponding I-864 Form and Barcode Requirements.

Source: United States Citizenship and Immigration Services