diff --git a/.hash b/.hash
index 43d4a61..b530dd6 100644
--- a/.hash
+++ b/.hash
@@ -1,6 +1,6 @@
 ainotes.cls,4b2f613
 fundamentals-of-ai-and-kr/module1,a7933cf
-fundamentals-of-ai-and-kr/module2,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,4b2f613
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index 4fa06b9..f63aadc 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ