diff --git a/src/main/java/caosdb/server/scripting/CallerSerializer.java b/src/main/java/caosdb/server/scripting/CallerSerializer.java
index 1bd265650bed0d5de865cc91b29db3327b56174b..1ab96ca0ab1a3f2dfefa14175d8423fea9bd4109 100644
--- a/src/main/java/caosdb/server/scripting/CallerSerializer.java
+++ b/src/main/java/caosdb/server/scripting/CallerSerializer.java
@@ -1,3 +1,25 @@
+/*
+ * ** header v3.0
+ * This file is a part of the CaosDB Project.
+ *
+ * Copyright (C) 2018 Research Group Biomedical Physics,
+ * Max-Planck-Institute for Dynamics and Self-Organization Göttingen
+ *
+ * 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
+ */
 package caosdb.server.scripting;
 
 import caosdb.server.CaosDBException;
diff --git a/src/main/java/caosdb/server/utils/Serializer.java b/src/main/java/caosdb/server/utils/Serializer.java
index 5508e99388a9e4191fd524ccbfc3e30007f6759a..26cd970c54d2bc4efcb7742ab9405a717e3ef112 100644
--- a/src/main/java/caosdb/server/utils/Serializer.java
+++ b/src/main/java/caosdb/server/utils/Serializer.java
@@ -1,3 +1,25 @@
+/*
+ * ** header v3.0
+ * This file is a part of the CaosDB Project.
+ *
+ * Copyright (C) 2018 Research Group Biomedical Physics,
+ * Max-Planck-Institute for Dynamics and Self-Organization Göttingen
+ *
+ * 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
+ */
 package caosdb.server.utils;
 
 public interface Serializer<T, S> {