Fix website url to use https.
diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index f71b376..7ec9893 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
*
- * This file is part of mbed TLS (http://www.polarssl.org)
+ * This file is part of mbed TLS (https://www.polarssl.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index e38d832..54f1462 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2006-2011, ARM Limited, All Rights Reserved
*
- * This file is part of mbed TLS (http://www.polarssl.org)
+ * This file is part of mbed TLS (https://www.polarssl.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index b4bfe76..5c7dd86 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
*
- * This file is part of mbed TLS (http://www.polarssl.org)
+ * This file is part of mbed TLS (https://www.polarssl.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/programs/x509/crl_app.c b/programs/x509/crl_app.c
index 0f492b5..4d91452 100644
--- a/programs/x509/crl_app.c
+++ b/programs/x509/crl_app.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
*
- * This file is part of mbed TLS (http://www.polarssl.org)
+ * This file is part of mbed TLS (https://www.polarssl.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/programs/x509/req_app.c b/programs/x509/req_app.c
index 0197beb..ced2d3e 100644
--- a/programs/x509/req_app.c
+++ b/programs/x509/req_app.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
*
- * This file is part of mbed TLS (http://www.polarssl.org)
+ * This file is part of mbed TLS (https://www.polarssl.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by