diff --git a/main.json b/main.json
index efcf98e..8e512cc 100644
--- a/main.json
+++ b/main.json
@@ -400,6 +400,12 @@
          "imagewidth":64,
          "margin":0,
          "name":"geraffel-logo-tile",
+         "properties":[
+                {
+                 "name":"tilesetCopyright",
+                 "type":"string",
+                 "value":"free"
+                }],
          "spacing":0,
          "tilecount":2,
          "tileheight":32,