diff --git a/requirements.txt b/requirements.txt
index bcdbc3e..02e1e4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ patsy==0.4.1
 pbr==3.1.1
 pexpect==4.3.1
 pickleshare==0.7.4
-Pillow==4.2.1
+Pillow==9.0.0
 plotly==2.0.15
 pomegranate==0.9.0
 prompt-toolkit==1.0.15