diff --git a/tlsf.c b/tlsf.c
index af57573..3e60ec3 100644
--- a/tlsf.c
+++ b/tlsf.c
@@ -1,10 +1,18 @@
-#include <assert.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+/*
+ * SPDX-FileCopyrightText: 2006-2016 Matthew Conte, 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * Written by Matthew Conte
+ * 	http://tlsf.baisoku.org
+ *
+ * Based on the original documentation by Miguel Masmano:
+ *	http://www.gii.upv.es/tlsf/main/docs
+ * 
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 
+#include <string.h>
+#include <limits.h>
+#include <stdio.h>
 #include "tlsf.h"
 
 #if defined(__cplusplus)
diff --git a/tlsf.h b/tlsf.h
index e9b5a91..0dc8934 100644
--- a/tlsf.h
+++ b/tlsf.h
@@ -1,43 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2006-2016 Matthew Conte, 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * Written by Matthew Conte
+ * 	http://tlsf.baisoku.org
+ *
+ * Based on the original documentation by Miguel Masmano:
+ *	http://www.gii.upv.es/tlsf/main/docs
+ * 
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
 #ifndef INCLUDED_tlsf
 #define INCLUDED_tlsf
 
-/*
-** Two Level Segregated Fit memory allocator, version 3.1.
-** Written by Matthew Conte
-**	http://tlsf.baisoku.org
-**
-** Based on the original documentation by Miguel Masmano:
-**	http://www.gii.upv.es/tlsf/main/docs
-**
-** This implementation was written to the specification
-** of the document, therefore no GPL restrictions apply.
-** 
-** Copyright (c) 2006-2016, Matthew Conte
-** 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.
-**     * Neither the name of the copyright holder nor the
-**       names of its contributors may be used to endorse or promote products
-**       derived from this software without specific prior written permission.
-** 
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-** DISCLAIMED. IN NO EVENT SHALL MATTHEW CONTE 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.
-*/
-
 #include <stddef.h>
 
 #if defined(__cplusplus)