diff --git a/engines/e_sdf.c b/engines/e_sdf.c
old mode 100755
new mode 100644
index 265ba997..8cd67c7e
--- a/engines/e_sdf.c
+++ b/engines/e_sdf.c
@@ -1,5 +1,5 @@
 /* ====================================================================
- * Copyright (c) 2016 The GmSSL Project.  All rights reserved.
+ * Copyright (c) 2014 - 2017 The GmSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
diff --git a/engines/e_skf.c b/engines/e_skf.c
old mode 100755
new mode 100644
index a7dcfa1d..1700be75
--- a/engines/e_skf.c
+++ b/engines/e_skf.c
@@ -1,5 +1,5 @@
 /* ====================================================================
- * Copyright (c) 2016 The GmSSL Project.  All rights reserved.
+ * Copyright (c) 2014 - 2017 The GmSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions