diff --git a/LICENSE b/LICENSE
index 51cb3a85..1b3b834a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -24,3 +24,5 @@ freely, subject to the following restrictions:
 Alternatively you may strike the license above and use it under any
 OSI approved open source license such as those listed at
 https://opensource.org/licenses/alphabetical
+
+SPDX-License-Identifier: any-OSI
\ No newline at end of file
diff --git a/doc/copyright.rst b/doc/copyright.rst
index ae9849ea..bbcbf4de 100644
--- a/doc/copyright.rst
+++ b/doc/copyright.rst
@@ -28,3 +28,4 @@ Alternatively you may strike the license above and use it under any
 OSI approved open source license such as those listed at
 https://opensource.org/licenses/alphabetical
 
+SPDX-License-Identifier: any-OSI
\ No newline at end of file