diff --git a/0thers/HW3/quadtree_Astar/requirements.txt b/0thers/HW3/quadtree_Astar/requirements.txt
index 50b4bad..d40c245 100644
--- a/0thers/HW3/quadtree_Astar/requirements.txt
+++ b/0thers/HW3/quadtree_Astar/requirements.txt
@@ -1,4 +1,4 @@
 pil-compat==1.0.0
-Pillow==6.0.0
+Pillow==9.0.1
 pqdict==1.0.0
 six==1.12.0