diff --git a/.hash b/.hash
index b625cf0..b50475f 100644
--- a/.hash
+++ b/.hash
@@ -3,5 +3,5 @@ fundamentals-of-ai-and-kr/module1,a7933cf
 fundamentals-of-ai-and-kr/module2,73fe58e
 fundamentals-of-ai-and-kr/module3,4b2f613
 languages-and-algorithms-for-ai/module2,a7933cf
-machine-learning-and-data-mining,e48a993
+machine-learning-and-data-mining,53f901b
 statistical-and-mathematical-methods-for-ai,a7933cf
diff --git a/machine-learning-and-data-mining/main.pdf b/machine-learning-and-data-mining/main.pdf
index 7fad965..ab6b13b 100644
Binary files a/machine-learning-and-data-mining/main.pdf and b/machine-learning-and-data-mining/main.pdf differ