diff --git a/blockdiag/requirements.txt b/blockdiag/requirements.txt
index 15a32838a..306e5c82b 100644
--- a/blockdiag/requirements.txt
+++ b/blockdiag/requirements.txt
@@ -8,7 +8,7 @@ itsdangerous==2.0.1
 Jinja2==3.0.1
 MarkupSafe==2.0.1
 nwdiag==2.0.0
-Pillow==8.2.0
+Pillow==8.3.0
 reportlab==3.5.68
 seqdiag==2.0.0
 webcolors==1.11.1