diff --git a/.hash b/.hash
index 2b781af..e7b2c9f 100644
--- a/.hash
+++ b/.hash
@@ -1,6 +1,6 @@
 ainotes.cls,dc59cd4
 fundamentals-of-ai-and-kr/module1,27778b1
-fundamentals-of-ai-and-kr/module2,b30f1ac
+fundamentals-of-ai-and-kr/module2,42cd9bd
 fundamentals-of-ai-and-kr/module3,0d20851
 languages-and-algorithms-for-ai/module2,a062cb0
 machine-learning-and-data-mining,0f3963d
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index 0be27ae..2356e77 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ