diff --git a/LICENSE b/LICENSE
index 68a49da..f5f404b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,24 +1,12 @@
-This is free and unencumbered software released into the public domain.
-
-Anyone is free to copy, modify, publish, use, compile, sell, or
-distribute this software, either in source code form or as a compiled
-binary, for any purpose, commercial or non-commercial, and by any
-means.
-
-In jurisdictions that recognize copyright laws, the author or authors
-of this software dedicate any and all copyright interest in the
-software to the public domain. We make this dedication for the benefit
-of the public at large and to the detriment of our heirs and
-successors. We intend this dedication to be an overt act of
-relinquishment in perpetuity of all present and future rights to this
-software under copyright law.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-For more information, please refer to <http://unlicense.org/>
+BSD Zero Clause License
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
diff --git a/README.md b/README.md
index e512665..3482217 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 [![GoDoc](https://godoc.org/github.com/realclientip/realclientip-go?status.svg)](http://godoc.org/github.com/realclientip/realclientip-go)
+[![Go Playground](https://img.shields.io/badge/Go-playground-%23007d9c?style=flat)](https://go.dev/play/p/Z0jNsEcOCnL)
 [![Test](https://github.com/realclientip/realclientip-go/actions/workflows/test.yml/badge.svg)](https://github.com/realclientip/realclientip-go/actions/workflows/test.yml)
 ![coverage](https://img.shields.io/badge/coverage-100%25-success?style=flat)
-![license](https://img.shields.io/badge/license-Unlicense-important.svg?style=flat)
+![license](https://img.shields.io/badge/license-0BSD-important.svg?style=flat)
 
 # realclientip-go
 
diff --git a/realclientip.go b/realclientip.go
index 40cf81c..ad05c08 100644
--- a/realclientip.go
+++ b/realclientip.go
@@ -1,4 +1,4 @@
-// SPDX: Unlicense
+// SPDX: 0BSD
 
 // Package realclientip provides strategies for obtaining the "real" client IP from HTTP requests.
 package realclientip
diff --git a/realclientip_test.go b/realclientip_test.go
index 40e76b8..6acc0bd 100644
--- a/realclientip_test.go
+++ b/realclientip_test.go
@@ -1,4 +1,4 @@
-// SPDX: Unlicense
+// SPDX: 0BSD
 
 package realclientip