Update date in copyright line
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index 2de728b..9974cb5 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -3,7 +3,7 @@
  *
  * \brief Diffie-Hellman-Merkle key exchange
  *
- *  Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *
  *  This file is part of mbed TLS (https://tls.mbed.org)
  *