diff --git a/dendronet_legacy/requirements.txt b/dendronet_legacy/requirements.txt
index cda78a0..c366e2c 100644
--- a/dendronet_legacy/requirements.txt
+++ b/dendronet_legacy/requirements.txt
@@ -53,7 +53,7 @@ olefile==0.45.1
 pandocfilters==1.4.2
 pexpect==4.2.1
 pickleshare==0.7.4
-Pillow==5.1.0
+Pillow==8.3.2
 pluggy==0.6.0
 prompt-toolkit==1.0.15
 protobuf==3.0.0