diff --git a/src/ieee754.c b/src/ieee754.c
index c52f6eb..4ae8dd6 100644
--- a/src/ieee754.c
+++ b/src/ieee754.c
@@ -1,42 +1,15 @@
 /*==============================================================================
+ ieee754.c -- floating point conversion between half, double and single precision
+ 
+ Copyright (c) 2018-2019, Laurence Lundblade. All rights reserved.
 
- Copyright (c) 2018, Laurence Lundblade.
- All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
-    * The name "Laurence Lundblade" may not be used to
-      endorse or promote products derived from this software without
-      specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
-WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
-ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ SPDX-License-Identifier: BSD-3-Clause
+ 
+ See BSD-3-Clause license in README.md
+ 
+ Created on 7/23/18
  ==============================================================================*/
 
-//
-//  ieee754.c
-//  Indefinite
-//
-//  Created by Laurence Lundblade on 7/23/18.
-//  Copyright © 2018 Laurence Lundblade. All rights reserved.
-//
-
 #include "ieee754.h"
 #include <string.h> // For memcpy()
 
diff --git a/src/ieee754.h b/src/ieee754.h
index fc94646..dfe45fb 100644
--- a/src/ieee754.h
+++ b/src/ieee754.h
@@ -1,40 +1,14 @@
 /*==============================================================================
-
- Copyright (c) 2018, Laurence Lundblade.
- All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
-    * The name "Laurence Lundblade" may not be used to
-      endorse or promote products derived from this software without
-      specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
-WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
-ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ ieee754.c -- floating point conversion between half, double and single precision
+ 
+ Copyright (c) 2018-2019, Laurence Lundblade. All rights reserved.
+ 
+ SPDX-License-Identifier: BSD-3-Clause
+ 
+ See BSD-3-Clause license in README.md
+ 
+ Created on 7/23/18
  ==============================================================================*/
-//
-//  ieee754.h
-//  Indefinite
-//
-//  Created by Laurence Lundblade on 7/23/18.
-//  Copyright © 2018 Laurence Lundblade. All rights reserved.
-//
 
 #ifndef ieee754_h
 #define ieee754_h