diff --git a/requirements.txt b/requirements.txt
index d323682..814007d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ kiwisolver==1.1.0
 matplotlib==3.1.2
 networkx==2.4
 numpy==1.17.4
-Pillow==6.2.1
+Pillow==9.0.0
 pyclustering==0.9.2
 pyparsing==2.4.5
 python-dateutil==2.8.1