diff --git a/requirements.txt b/requirements.txt
index 40e79f0..cb66f4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ gevent-websocket==0.10.1
 h5py==2.6.0
 python-socketio==4.4.0
 numpy==1.13.1
-Pillow==2.2.1
+Pillow==9.3.0
 scipy==0.19.1
 keras==2.0.8
 tensorflow==1.3.0