diff --git a/Dockerfile b/Dockerfile
index 39210ba..a3add89 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,19 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
 FROM golang:1.22-alpine as builder
 
 RUN apk update
diff --git a/app/attr.go b/app/attr.go
index 9bb97ef..7f09087 100644
--- a/app/attr.go
+++ b/app/attr.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package app
 
 import (
diff --git a/app/crypto.go b/app/crypto.go
index 9c9c9ae..c9ee9d9 100644
--- a/app/crypto.go
+++ b/app/crypto.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package app
 
 import (
diff --git a/app/db.go b/app/db.go
index a405272..365cd5e 100644
--- a/app/db.go
+++ b/app/db.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package app
 
 import (
diff --git a/app/generic.go b/app/generic.go
index c83311d..f86005f 100644
--- a/app/generic.go
+++ b/app/generic.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package app
 
 // look if a key in a map exists, generic variant
diff --git a/cmd/anydb.go b/cmd/anydb.go
index 23dc49a..4b6845c 100644
--- a/cmd/anydb.go
+++ b/cmd/anydb.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package cmd
 
 var manpage = `
diff --git a/cmd/crud.go b/cmd/crud.go
index 4bc11fb..6479f62 100644
--- a/cmd/crud.go
+++ b/cmd/crud.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package cmd
 
 import (
diff --git a/cmd/root.go b/cmd/root.go
index 39a0188..2bc67d5 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package cmd
 
 import (
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 332e82f..5a4ad41 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,3 +1,19 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
 version: "3.9"
 services:
   init:
diff --git a/main.go b/main.go
index f51bb60..7a66dba 100644
--- a/main.go
+++ b/main.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package main
 
 import (
diff --git a/main_test.go b/main_test.go
index 71ba053..8ef2dce 100644
--- a/main_test.go
+++ b/main_test.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package main
 
 import (
diff --git a/mkrel.sh b/mkrel.sh
index 88250da..94d3d8f 100755
--- a/mkrel.sh
+++ b/mkrel.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright © 2023 Thomas von Dein
+# Copyright © 2024 Thomas von Dein
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/output/export.go b/output/export.go
index 7099f81..27ea719 100644
--- a/output/export.go
+++ b/output/export.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package output
 
 import (
diff --git a/output/list.go b/output/list.go
index b664360..eeaadf4 100644
--- a/output/list.go
+++ b/output/list.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package output
 
 import (
diff --git a/output/single.go b/output/single.go
index ebfa252..44e8330 100644
--- a/output/single.go
+++ b/output/single.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 package output
 
 import (
diff --git a/rest/handlers.go b/rest/handlers.go
index aec1325..83f4cd2 100644
--- a/rest/handlers.go
+++ b/rest/handlers.go
@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/t/files.txtar b/t/files.txtar
index 6f0dbc2..7ab329a 100644
--- a/t/files.txtar
+++ b/t/files.txtar
@@ -1,3 +1,20 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
+
 # simple file, we cannot use redirection here, so dd is our friend
 exec dd if=/dev/random of=file.txt count=5 bs=10
 
diff --git a/t/interface.txtar b/t/interface.txtar
index d8cf1e6..f5bd861 100644
--- a/t/interface.txtar
+++ b/t/interface.txtar
@@ -1,3 +1,20 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
+
 # check default outputs
 
 exec anydb -v
diff --git a/t/restore.txtar b/t/restore.txtar
index 9e79aaa..f2cfe9c 100644
--- a/t/restore.txtar
+++ b/t/restore.txtar
@@ -1,3 +1,20 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
+
 # setup simple db
 exec anydb -f test.db set foo bar
 
diff --git a/t/workflow.txtar b/t/workflow.txtar
index de30e5f..a1e30b8 100644
--- a/t/workflow.txtar
+++ b/t/workflow.txtar
@@ -1,3 +1,20 @@
+# 
+# Copyright © 2024 Thomas von Dein
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# 
+
 # simple entry
 exec anydb -f test.db set foo bar