diff --git a/requirements.txt b/requirements.txt
index 1314bba..5ecc845 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ mecab-python3==0.7
 networkx==2.2
 numpy==1.15.4
 pandas==0.23.4
-Pillow==5.3.0
+Pillow==9.3.0
 pyparsing==2.3.0
 python-dateutil==2.7.5
 python-louvain==0.11