diff --git a/.hash b/.hash
index 5cf745e..62e071b 100644
--- a/.hash
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@@ -3,5 +3,5 @@ fundamentals-of-ai-and-kr/module1,a90b33a
 fundamentals-of-ai-and-kr/module2,3763967
 fundamentals-of-ai-and-kr/module3,58eee04
 languages-and-algorithms-for-ai/module2,7f3bc2d
-machine-learning-and-data-mining,098bb90
+machine-learning-and-data-mining,be45bdc
 statistical-and-mathematical-methods-for-ai,b8b751d
diff --git a/machine-learning-and-data-mining/main.pdf b/machine-learning-and-data-mining/main.pdf
index ab52e3e..728ae6a 100644
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