Update date in copyright line
diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index c0abc52..82ad8d6 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -3,7 +3,7 @@
  *
  * \brief X.509 certificate parsing and writing
  *
- *  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)
  *