diff --git a/readme.md b/readme.md
index 82de362..56a6a06 100644
--- a/readme.md
+++ b/readme.md
@@ -40,10 +40,6 @@ if (src.match(/^(https)?:\/\/|^\/\//)) {
 if (src.match(/^(file|https)?:\/\/|^\/\//)) {
 ```
 
-## known bugs
-
-* new tiles can be duplicates
-
 ## to do
 
 * make it clear that the user can paste in their own game data