diff --git a/requirements.txt b/requirements.txt
index 22cc338..856b0ba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ keras==2.2.4
 matplotlib==2.2.3
 numpy==1.15.3
 pandas==0.23.3
-pillow==6.2.0
+pillow==9.0.0
 pytest==3.4.0
 scikit-optimize==0.5.2
 scikit_image==0.13.1