diff --git a/README.md b/README.md
index 6f5349e..8f63656 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ All received messages are written to *stdout* and/or forwarded to a remote loggi
 
 The syslog server is able to listen on both UDP and TCP and parses syslog messages in either RFC5424 or RFC3164 (BSD) format.
 
+This software is free to use and is licensed under the [Apache 2.0 License](https://bitbucket.org/mnellemann/syslogd/src/master/LICENSE).
+
 ![architecture](https://bitbucket.org/mnellemann/syslogd/downloads/syslogd.svg)
 
 The default syslog port (514) requires you to run syslogd as root / administrator.
diff --git a/src/main/java/biz/nellemann/syslogd/Ansi.java b/src/main/java/biz/nellemann/syslogd/Ansi.java
index 4d1d185..57b7e4a 100644
--- a/src/main/java/biz/nellemann/syslogd/Ansi.java
+++ b/src/main/java/biz/nellemann/syslogd/Ansi.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2021 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd;
 
 public enum Ansi {
diff --git a/src/main/java/biz/nellemann/syslogd/SyslogPrinter.java b/src/main/java/biz/nellemann/syslogd/SyslogPrinter.java
index a02157c..f0cc824 100644
--- a/src/main/java/biz/nellemann/syslogd/SyslogPrinter.java
+++ b/src/main/java/biz/nellemann/syslogd/SyslogPrinter.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2021 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd;
 
 import biz.nellemann.syslogd.msg.Facility;
diff --git a/src/main/java/biz/nellemann/syslogd/VersionProvider.java b/src/main/java/biz/nellemann/syslogd/VersionProvider.java
index 6e1a188..c6cb518 100644
--- a/src/main/java/biz/nellemann/syslogd/VersionProvider.java
+++ b/src/main/java/biz/nellemann/syslogd/VersionProvider.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2021 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd;
 
 import picocli.CommandLine;
diff --git a/src/main/java/biz/nellemann/syslogd/msg/Facility.java b/src/main/java/biz/nellemann/syslogd/msg/Facility.java
index 388da34..6895900 100644
--- a/src/main/java/biz/nellemann/syslogd/msg/Facility.java
+++ b/src/main/java/biz/nellemann/syslogd/msg/Facility.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2020 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd.msg;
 
 import java.util.HashMap;
diff --git a/src/main/java/biz/nellemann/syslogd/msg/Severity.java b/src/main/java/biz/nellemann/syslogd/msg/Severity.java
index 5a12114..2986129 100644
--- a/src/main/java/biz/nellemann/syslogd/msg/Severity.java
+++ b/src/main/java/biz/nellemann/syslogd/msg/Severity.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2020 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd.msg;
 
 import java.util.HashMap;
diff --git a/src/main/java/biz/nellemann/syslogd/net/LokiClient.java b/src/main/java/biz/nellemann/syslogd/net/LokiClient.java
index 08118ab..c27c7bc 100644
--- a/src/main/java/biz/nellemann/syslogd/net/LokiClient.java
+++ b/src/main/java/biz/nellemann/syslogd/net/LokiClient.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2021 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd.net;
 
 import org.slf4j.Logger;
diff --git a/src/main/java/biz/nellemann/syslogd/net/UdpClient.java b/src/main/java/biz/nellemann/syslogd/net/UdpClient.java
index 76e1a03..4f29ef9 100644
--- a/src/main/java/biz/nellemann/syslogd/net/UdpClient.java
+++ b/src/main/java/biz/nellemann/syslogd/net/UdpClient.java
@@ -1,3 +1,18 @@
+/*
+   Copyright 2021 mark.nellemann@gmail.com
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
 package biz.nellemann.syslogd.net;
 
 import org.slf4j.Logger;
diff --git a/src/main/java/biz/nellemann/syslogd/parser/JsonUtil.java b/src/main/java/biz/nellemann/syslogd/parser/JsonUtil.java
index 9a8918f..14882fa 100644
--- a/src/main/java/biz/nellemann/syslogd/parser/JsonUtil.java
+++ b/src/main/java/biz/nellemann/syslogd/parser/JsonUtil.java
@@ -1,8 +1,8 @@
-package biz.nellemann.syslogd.parser;
-
 /*
-    Code from https://gist.github.com/jjfiv/2ac5c081e088779f49aa, which is BSD licensed: http://lemurproject.org/galago-license
+    This code is from https://gist.github.com/jjfiv/2ac5c081e088779f49aa, which is BSD licensed:
+    http://lemurproject.org/galago-license
 */
+package biz.nellemann.syslogd.parser;
 
 public class JsonUtil {