diff --git a/tool/rawstr4c/bin/rawstr4c b/tool/rawstr4c/bin/rawstr4c
index fc7fafb..3560846 100644
--- a/tool/rawstr4c/bin/rawstr4c
+++ b/tool/rawstr4c/bin/rawstr4c
@@ -1,7 +1,7 @@
 #!/usr/bin/env raku
 # ---------------------------------------------------------------
 # Copyright © 2025-2025 Aoran Zeng
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: Artistic-2.0
 # ---------------------------------------------------------------
 # File Name     : rawstr4c.raku
 # File Authors  : Aoran Zeng <ccmywish@qq.com>
@@ -20,7 +20,7 @@ use Rawstr4c::Version;
 
 sub USAGE() {
   print qq:to/END/;
-    rawstr4c: Raw String for C (GPLv3+) v{Rawstr4c::Version::VERSION}-{Rawstr4c::Version::RELEASE_DATE}
+    rawstr4c: Raw Strings for C (Artistic-2.0) v{Rawstr4c::Version::VERSION}-{Rawstr4c::Version::RELEASE_DATE}
 
     Usage: rawstr4c [options] <FILE.md|DIR>
 
@@ -50,7 +50,7 @@ sub MAIN(
 )
 {
   if ($version || $v) {
-    print Version::VERSION_CONTENT_FOR_-version;
+    print Rawstr4c::Version::VERSION_CONTENT_FOR_-version;
     exit(0);
   }
 
diff --git a/tool/rawstr4c/lib/Rawstr4c/Config.rakumod b/tool/rawstr4c/lib/Rawstr4c/Config.rakumod
index 8f3bc03..e429386 100644
--- a/tool/rawstr4c/lib/Rawstr4c/Config.rakumod
+++ b/tool/rawstr4c/lib/Rawstr4c/Config.rakumod
@@ -1,5 +1,5 @@
 # ---------------------------------------------------------------
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: Artistic-2.0
 # ---------------------------------------------------------------
 # File Name     : Config.rakumod
 # File Authors  : Aoran Zeng <ccmywish@qq.com>
diff --git a/tool/rawstr4c/lib/Rawstr4c/Generator.rakumod b/tool/rawstr4c/lib/Rawstr4c/Generator.rakumod
index 76c1472..c8f7a51 100644
--- a/tool/rawstr4c/lib/Rawstr4c/Generator.rakumod
+++ b/tool/rawstr4c/lib/Rawstr4c/Generator.rakumod
@@ -1,5 +1,5 @@
 # ---------------------------------------------------------------
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: Artistic-2.0
 # ---------------------------------------------------------------
 # File Name     : Generator.rakumod
 # File Authors  : Aoran Zeng <ccmywish@qq.com>
diff --git a/tool/rawstr4c/lib/Rawstr4c/Parser.rakumod b/tool/rawstr4c/lib/Rawstr4c/Parser.rakumod
index f01f621..8d6a70b 100644
--- a/tool/rawstr4c/lib/Rawstr4c/Parser.rakumod
+++ b/tool/rawstr4c/lib/Rawstr4c/Parser.rakumod
@@ -1,5 +1,5 @@
 # ---------------------------------------------------------------
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: Artistic-2.0
 # ---------------------------------------------------------------
 # File Name     : Parser.rakumod
 # File Authors  : Aoran Zeng <ccmywish@qq.com>
diff --git a/tool/rawstr4c/lib/Rawstr4c/Version.rakumod b/tool/rawstr4c/lib/Rawstr4c/Version.rakumod
index ff79ca3..0bc3f72 100644
--- a/tool/rawstr4c/lib/Rawstr4c/Version.rakumod
+++ b/tool/rawstr4c/lib/Rawstr4c/Version.rakumod
@@ -1,5 +1,5 @@
 # ---------------------------------------------------------------
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: Artistic-2.0
 # ---------------------------------------------------------------
 # File Name     : Version.rakumod
 # File Authors  : Aoran Zeng <ccmywish@qq.com>
@@ -19,7 +19,7 @@ constant Maintain_URL2 = "https://gitee.com/RubyMetric/chsrc/blob/dev/tool/rawst
 constant VERSION_CONTENT_FOR_-version = qq:to/EOF/
   rawstr4c {VERSION}
   Copyright (C) 2025 Aoran Zeng
-  License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
+  License Artistic-2.0: Artistic License 2.0 <https://opensource.org/licenses/Artistic-2.0>
   This is free software: you are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.