diff --git a/.hash b/.hash
index 45a0ccb..85a64b2 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,f51fdde
+fundamentals-of-ai-and-kr/module2,b30f1ac
 fundamentals-of-ai-and-kr/module3,0d20851
 languages-and-algorithms-for-ai/module2,f23e2ff
 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 c405ba9..0be27ae 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ