diff --git a/requirements.txt b/requirements.txt
index b909486..c78cc80 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ ijson==2.3
 matplotlib==1.5.1
 networkx==1.11
 numpy==1.11.1
-Pillow==3.3.0
+Pillow==9.3.0
 pyparsing==2.1.5
 python-dateutil==2.5.3
 pytz==2016.6.1