diff --git a/assembler_tools/hec-assembler-tools/requirements.txt b/assembler_tools/hec-assembler-tools/requirements.txt
index 67c2a99..a2ed2e1 100644
--- a/assembler_tools/hec-assembler-tools/requirements.txt
+++ b/assembler_tools/hec-assembler-tools/requirements.txt
@@ -7,7 +7,7 @@ matplotlib==3.7.1
 networkx==3.0
 numpy==1.24.2
 packaging==23.0
-Pillow==10.3.0
+Pillow==12.1.1
 pytest==8.4.0
 python-dateutil==2.8.2
 PyYAML==6.0