diff --git a/u4/word_count.py b/u4/word_count.py
index 6ae7fa3..fdcda35 100644
--- a/u4/word_count.py
+++ b/u4/word_count.py
@@ -2,7 +2,7 @@ import re
 from collections import Counter
 
 def count_words(text: str) -> dict[str, int]:
-    text = text.lower
+    text = text.lower()
 
     words = re.findall(r"[a-z0-9áäčďéíľňóôŕšťúýž]+(?:'[a-z0-9áäčďéíľňóôŕšťúýž]+)?", text)