diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 44023e9d1..5a16bc391 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -869,3 +869,4 @@ can find it below.
 - Have not changed source names
 - Have explicitly kept the `id` if a source's name or language were changed
 - Have tested the modifications by compiling and running the extension through Android Studio
+- Have removed `web_hi_res_512.png` when adding a new extension