diff --git a/.hash b/.hash
index 62e071b..6a9f1e9 100644
--- a/.hash
+++ b/.hash
@@ -1,6 +1,6 @@
 ainotes.cls,dc59cd4
 fundamentals-of-ai-and-kr/module1,a90b33a
-fundamentals-of-ai-and-kr/module2,3763967
+fundamentals-of-ai-and-kr/module2,2bc083d
 fundamentals-of-ai-and-kr/module3,58eee04
 languages-and-algorithms-for-ai/module2,7f3bc2d
 machine-learning-and-data-mining,be45bdc
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index dbe5a6d..d5d9d3d 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ