diff --git a/api.go b/api.go
index b8e79fd899d01982a805be60751c9f5ea4fbafa1..ceef69de5bcc5fe993a91b414ef07579c59690e0 100644
--- a/api.go
+++ b/api.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/api_test.go b/api_test.go
index 4bce996938dc64ffffcb29459da8327855c0fb47..eeaac847ca4f2c32101284b7e595c3db6cfe3459 100644
--- a/api_test.go
+++ b/api_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/benchmark_test.go b/benchmark_test.go
index 094f9d704ee337b0f15ce10ccbf288c8498c9e67..3f9b66b755389e8af5adfce69120d63e16e6c65e 100644
--- a/benchmark_test.go
+++ b/benchmark_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/change.go b/change.go
index d031649b1c0d12e288e46a0d146f24a1554bba86..18c63d98f08831814a34d3262ed4c6995f9f0d65 100644
--- a/change.go
+++ b/change.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/change_test.go b/change_test.go
index 0d4e8e7dc07535c5838fefb5c7a790e46a10604c..2b8d8adbc4e6d3a25916a96974d182c807830037 100644
--- a/change_test.go
+++ b/change_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/constants.go b/constants.go
index 8506736c024095182882eb941dbd634f6346a889..4e60933d679db1b07e26e24bf0111920f694885f 100644
--- a/constants.go
+++ b/constants.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/doc.go b/doc.go
index aa1bcca45eed6debd30c339399ae89b0693b9e7a..8f3ba28bb8ac4df1a790f2e82e1473ab24e6f34d 100644
--- a/doc.go
+++ b/doc.go
@@ -1,7 +1,7 @@
 // This package provides a simple way to configure a program.
 
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as published
diff --git a/env.go b/env.go
index 87dd684153fababd306da4103db1ac9aae4e13d4..50ac0d1f63fec8725dbdaf88a2f09fe53cf6aa48 100644
--- a/env.go
+++ b/env.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/env_test.go b/env_test.go
index 9dbf42dc31036e7bf415371d4b992b676288bb99..93fb42aba5b0838499a6091a41df783577d2739c 100644
--- a/env_test.go
+++ b/env_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/error.go b/error.go
index a02a0d61928b12f6249a9c2d58612349a8373cbf..25de8743ed6b37e0cad391c4832191bac750e217 100644
--- a/error.go
+++ b/error.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/error_test.go b/error_test.go
index 4ba827a5535e607ad1400240b5d9f366aae195d9..4697724d1558c9db0cf740e072c173dfa704fc24 100644
--- a/error_test.go
+++ b/error_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/export.go b/export.go
index 82ed43dac7247b8f0fd9e512ce5e3f2747d05329..bbeba7f0482c2beba1355d4a81865037957cfdbb 100644
--- a/export.go
+++ b/export.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/export_test.go b/export_test.go
index 2133e867bd48d6a776a2fdd319e8d4dee9c8c3f2..261f691b22e11b05d3bfcade154719ed0d3eb93d 100644
--- a/export_test.go
+++ b/export_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/file.go b/file.go
index 3870c9c8158aa6699b8f23a62e265dfe5ebe0580..7adc224c7e263ce2850bed3838160c45e33e3d57 100644
--- a/file.go
+++ b/file.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/file_test.go b/file_test.go
index 4b05aa290e63efef2e7a8fa7b1fe2bd1bf8a6e88..61649a1d3bd35beceaddfe98a2b63335ae6788f3 100644
--- a/file_test.go
+++ b/file_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/filesystem.go b/filesystem.go
index 302bff44d581327953fdfc7db3a6bf24200aebde..9cf5b9524ed6e10359fb31182e33bea516f75996 100644
--- a/filesystem.go
+++ b/filesystem.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/filesystem_test.go b/filesystem_test.go
index a236696a65895dc608886978d2f0c1aa665b163c..3e3f35004f4294485464f87f68a8d885ff764f0d 100644
--- a/filesystem_test.go
+++ b/filesystem_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/flags.go b/flags.go
index 44dcfb74c2a25f05092c49162391902c67141433..904947ba41fcd5c2df2506582b94e068eceece0e 100644
--- a/flags.go
+++ b/flags.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/flags_test.go b/flags_test.go
index 195180c3d45f8adbbf80799d553fa9a9954cbcb5..24a7da0d977a903d4cc71842e06ff4f44f3b5f6a 100644
--- a/flags_test.go
+++ b/flags_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/format.go b/format.go
index e3f3e317bb8049b23af8c6169608ac4a9afa45ff..8bdaa9cb98d73f38b1dd964b8552834d8feaf29e 100644
--- a/format.go
+++ b/format.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/format_test.go b/format_test.go
index a14897bb7c424d88cb05a3b4d18f0ee23cc2846d..36a931be8c34e8e4efae37f4de9c363b9b938a5a 100644
--- a/format_test.go
+++ b/format_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/http-handler.go b/http-handler.go
index 058846ca8180ebae40c7d5363f06c0e62df83bf8..c865f4289e8b923c21ce086b82b0dad6f64ed3dc 100644
--- a/http-handler.go
+++ b/http-handler.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/http-handler_test.go b/http-handler_test.go
index 2f84e6fa3026ccf4dd9a237b39bed06fde0c5000..1955070486847a580256ff6a336b26b96ce1b52f 100644
--- a/http-handler_test.go
+++ b/http-handler_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/import.go b/import.go
index 687869a78cbf76b306263fd5d3231b13f4905812..6ec9e29dc641513eeaeeb0d77de0f029f48566da 100644
--- a/import.go
+++ b/import.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/import_test.go b/import_test.go
index 9502c3608c0ed83ec41df062f4fb530dc5b6c3cd..c1e94f90fba6564a412b2808dc04e6fe3208e900 100644
--- a/import_test.go
+++ b/import_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/integration_test.go b/integration_test.go
index 0f0337df3c909fb5acd1593bc167f30c72afcb32..89e6e908f341dbfe42ca43269891b8c1c720ccfd 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/properties.go b/properties.go
index bc783eeec32c23008b004dfbbee9c660a7294940..17a337c102b1cefc7d9f451ccb6c9e990f7c200b 100644
--- a/properties.go
+++ b/properties.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
@@ -31,7 +31,7 @@ func getMapForProperties[C any](c C) (map[string]string, []error) {
 		default:
 			errors = append(errors, newUnsupportedReflectKindError(field.Type()))
 		}
-		
+
 	})
 
 	return m, errors
diff --git a/properties_test.go b/properties_test.go
index b6dbc8b0a0461184d7cca35f2ac7486057676939..ed49efa4a692160cbf4e9821595fd6284d88de75 100644
--- a/properties_test.go
+++ b/properties_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/settings.go b/settings.go
index dfbbce088f8e4e8dbc8cba3af9305e6ed5352d18..118d9db498969893a338d91d7fa1341f2e1fc25c 100644
--- a/settings.go
+++ b/settings.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/settings_test.go b/settings_test.go
index c0326e44ca190bf3f45dc74eabc3697a682c1b38..131151ab73985d3202f7685d8cbc46533e8ed72b 100644
--- a/settings_test.go
+++ b/settings_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/stream.go b/stream.go
index 4c3f77ccd73b7c6705a3779767f19ffa4e9c115b..4ad5621aa39a7ebabf1dc6596ae407036cd2ae37 100644
--- a/stream.go
+++ b/stream.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/stream_test.go b/stream_test.go
index 44db5df6633426450a58dfcdba684e354875554b..f6fe7243c3884c4404147d410074a4b9eb875c95 100644
--- a/stream_test.go
+++ b/stream_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/tags.go b/tags.go
index 3142e903d1c9412581ca628ae5def36a9c48fa17..962b5c8f1da2177dabf2ebb7398899403234a662 100644
--- a/tags.go
+++ b/tags.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/tags_test.go b/tags_test.go
index d21da608e7b5bb1f3bc76e778798a92ad1274931..0856679935fbe8df91bb4a63484dae09e47f928f 100644
--- a/tags_test.go
+++ b/tags_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/watch.go b/watch.go
index 3d7ad7e5cafbe68a269496f59982de07a91e37ab..a1d3d7ac18739f14091b5ab9372852abaed45914 100644
--- a/watch.go
+++ b/watch.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration
 
diff --git a/watch_test.go b/watch_test.go
index 76aa31031e73234d2da47620d3a5bda23380bbdc..d66c2100702949c18ced0ef4491c802674426b78 100644
--- a/watch_test.go
+++ b/watch_test.go
@@ -1,5 +1,5 @@
 // Copyright 2022 schukai GmbH
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0
 
 package configuration