Bump version to 1.3.13
diff --git a/ChangeLog b/ChangeLog
index 0dbf4e5..c84850a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
 mbed TLS ChangeLog (Sorted per branch, date)
 
-= mbed TLS 1.3.13 reladsed 2015-??-??
+= mbed TLS 1.3.13 reladsed 2015-09-17
 
 Security
    * Fix possible client-side NULL pointer dereference (read) when the client