diff --git a/.hash b/.hash
index 38ca5e3..34d379c 100644
--- a/.hash
+++ b/.hash
@@ -1,6 +1,6 @@
 ainotes.cls,e5659dd
 fundamentals-of-ai-and-kr/module1,a2e8cd8
-fundamentals-of-ai-and-kr/module2,e5659dd
+fundamentals-of-ai-and-kr/module2,b60d21d
 fundamentals-of-ai-and-kr/module3,0d20851
 languages-and-algorithms-for-ai/module2,e5659dd
 machine-learning-and-data-mining,dafa14c
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index 9aacc77..202f80f 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ