diff --git a/avdweb_VirtualDelay.cpp b/avdweb_VirtualDelay.cpp
index 4428893..e4d781f 100644
--- a/avdweb_VirtualDelay.cpp
+++ b/avdweb_VirtualDelay.cpp
@@ -5,10 +5,14 @@ as published by the Free Software Foundation, either version 3 of the License, o
 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 at http://www.gnu.org/licenses .
 
-Version 10-1-2016
-Version 6-9-2017 elapsed(), added start()
-Version 19-9-2017 DO_ONCE without class
-Version 19-9-2017 fix rollover bug
+AUTHOR: Albert van Dalen
+WEBSITE: http://www.avdweb.nl/arduino/libraries/virtualdelay.html
+
+HISTORY:
+1.0.0   10-1-2016
+1.0.1   6-9-2017 elapsed(), added start()
+1.0.2   19-9-2017 DO_ONCE without class
+1.0.3 / 19-9-2017 fix rollover bug
 
 start         _____|_____________________
                     __________
diff --git a/avdweb_VirtualDelay.h b/avdweb_VirtualDelay.h
index 4bd3605..cb0c8fb 100644
--- a/avdweb_VirtualDelay.h
+++ b/avdweb_VirtualDelay.h
@@ -1,3 +1,14 @@
+/*
+Copyright (C) 2016  Albert van Dalen http://www.avdweb.nl
+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 at http://www.gnu.org/licenses .
+
+AUTHOR: Albert van Dalen
+WEBSITE: http://www.avdweb.nl/arduino/libraries/virtualdelay.html
+*/
+
 #ifndef VirtualDelay_H
 #define VirtualDelay_H
 
diff --git a/library.properties b/library.properties
index 171bc2c..f0e61ff 100644
--- a/library.properties
+++ b/library.properties
@@ -1,10 +1,10 @@
-name=avdweb_VirtualDelay
-version=19.9.2017
-author=Albert van Dalen
-maintainer=Albert van Dalen <a@maxun.cc>
-sentence=Allows using (multiple) delays without blocking code execution. Arduino Uno and Zero.
-paragraph=During the delay, the code execution is continued. We can use multiple delays simultaneously and independent of each other.
-category=Timing
-url=https://github.com/avandalen/VirtualDelay
-architectures=atmelavr, atmelsam
+name=avdweb_VirtualDelay
+version=1.0.3
+author=Albert van Dalen
+maintainer=Albert van Dalen <a@maxun.cc>
+sentence=Allows using (multiple) delays without blocking code execution. Arduino Uno and Zero.
+paragraph=During the delay, the code execution is continued. We can use multiple delays simultaneously and independent of each other.
+category=Timing
+url=https://github.com/avandalen/VirtualDelay
+architectures=atmelavr, atmelsam