diff --git a/.hash b/.hash
index 4895af3..0b3fdad 100644
--- a/.hash
+++ b/.hash
@@ -1,6 +1,6 @@
 ainotes.cls,dc59cd4
 fundamentals-of-ai-and-kr/module1,e7fdd58
-fundamentals-of-ai-and-kr/module2,62caefa
+fundamentals-of-ai-and-kr/module2,2ef29c7
 fundamentals-of-ai-and-kr/module3,3836519
 languages-and-algorithms-for-ai/module2,0dff0b4
 machine-learning-and-data-mining,1e498f5
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index 1ac7ebc..a251316 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ