diff --git a/u4/word_count.py b/u4/word_count.py
index 92a5b84..6a0d8c8 100644
--- a/u4/word_count.py
+++ b/u4/word_count.py
@@ -4,7 +4,7 @@ def count_words(sentence: str) -> dict[str, int]:
     sentence = sentence.lower()
 
     for char in sentence:
-        if not char.isanum() and char not in ("'", " "):
+        if not char.isalnum() and char not in ("'", " "):
             sentence = sentence.replace(char, " ")
 
     words = sentence.split()