diff --git a/src/renderview.css b/src/renderview.css
index b8d0354..d2f5443 100644
--- a/src/renderview.css
+++ b/src/renderview.css
@@ -1,3 +1,11 @@
+/*************************************************************************************************
+  renderview.css
+
+  This file is dedicated to the public domain under CC0 1.0.
+  This file is developed at https://github.com/pygfx/renderview, please contribute changes there.
+
+ *************************************************************************************************/
+
 div.renderview-wrapper {
     display: inline-block;
     position: relative;