diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4ee1991ea606d0d88aee5bcd2b240fb4e51f57e..c9fc18824ac6e1641ff8997167666b5ee2e6a023 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,8 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added ###
 
-* Entity State support (experimental). See the `caosdb.State` class for more
-  information.
+* Entity State support (experimental, no StateModel support yet). See the `caosdb.State` class for
+  more information.
 * Versioning support (experimental).
 
 ### Changed ###
diff --git a/src/caosdb/common/state.py b/src/caosdb/common/state.py
index eb81b3438b6071a7ef003aaa6af07aee737c4132..49eb59a7dfb5968d3da22d4d795ca69fd7eb8de4 100644
--- a/src/caosdb/common/state.py
+++ b/src/caosdb/common/state.py
@@ -1,3 +1,25 @@
+# ** header v3.0
+# This file is a part of the CaosDB Project.
+#
+# Copyright (C) 2020 IndiScale GmbH <info@indiscale.com>
+# Copyright (C) 2020 Timm Fitschen <t.fitschen@indiscale.com>
+#
+# 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 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# ** end header
+
+
 from lxml import etree