diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..fd31362
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,11 @@
+Copyright (c) 2023 Joshua Lee Ockert <torstenvl@gmail.com>
+
+THIS WORK IS PROVIDED "AS IS" WITH NO WARRANTY OF ANY KIND. THE IMPLIED
+WARRANTIES OF MERCHANTABILITY, FITNESS, NON-INFRINGEMENT, AND TITLE ARE
+EXPRESSLY DISCLAIMED. NO AUTHOR SHALL BE LIABLE UNDER ANY THEORY OF LAW
+FOR ANY DAMAGES OF ANY KIND RESULTING FROM THE USE OF THIS WORK.
+
+Permission to use, copy, modify, and/or distribute this work for any
+purpose is hereby granted, provided this notice appears in all copies.
+
+SPDX-License-Identifier: ISC
diff --git a/dirdedupe.sh b/dirdedupe.sh
index 68b09bf..5bc56a6 100755
--- a/dirdedupe.sh
+++ b/dirdedupe.sh
@@ -9,6 +9,8 @@
 #
 # Permission to use, copy, modify, and/or distribute this work for any
 # purpose is hereby granted, provided this notice appears in all copies.
+#
+# SPDX-License-Identifier: ISC
 
 
 ############################################################################
diff --git a/tmbless.sh b/tmbless.sh
index 971357e..9050ee9 100755
--- a/tmbless.sh
+++ b/tmbless.sh
@@ -9,6 +9,8 @@
 #
 # Permission to use, copy, modify, and/or distribute this work for any
 # purpose is hereby granted, provided this notice appears in all copies.
+#
+# SPDX-License-Identifier: ISC
 
 
 function dispusage() {
diff --git a/tmimport.sh b/tmimport.sh
index b33d231..9e11da6 100755
--- a/tmimport.sh
+++ b/tmimport.sh
@@ -9,6 +9,8 @@
 #
 # Permission to use, copy, modify, and/or distribute this work for any
 # purpose is hereby granted, provided this notice appears in all copies.
+#
+# SPDX-License-Identifier: ISC
 
 
 function dispusage() {