diff --git a/README.md b/README.md
index 6c4ef15..da0b5ce 100644
--- a/README.md
+++ b/README.md
@@ -59,3 +59,5 @@ Feel free to implement these, or add your own ideas. Pull requests welcome!
 * Traversable#head, Traversable#last, Traversable#maxBy
 * Warn on shadowing variables, especially those of the same type
 * Warn on inexhaustive pattern matching
+* Warn about pattern matching companion objects of case classes instead of instances themselves
+* Warn when referencing members of `collection.mutable._` without explicit qualification