Update version number to 2.1.7 for release
diff --git a/ChangeLog b/ChangeLog
index f4ce56d..fe5ce65 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
 mbed TLS ChangeLog (Sorted per branch, date)
 
-= mbed TLS 2.1.x branch released xxxx-xx-xx
+= mbed TLS 2.1.7 branch released 2017-03-08
 
 Security
    * Add checks to prevent signature forgeries for very large messages while