diff --git a/requirements.txt b/requirements.txt
index ab9348a..b6d7c91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 openslide-python==1.1.1
-Pillow==6.2.0
+Pillow==8.3.2
 opencv-python==3.4.4.19
 shapely==1.6.4
 pydaily==0.4.0