diff --git a/tools/mapmerge2/requirements.txt b/tools/mapmerge2/requirements.txt
index 42fc58a7c2..01a171deb3 100644
--- a/tools/mapmerge2/requirements.txt
+++ b/tools/mapmerge2/requirements.txt
@@ -1,3 +1,3 @@
 pygit2
 bidict==0.13.1
-Pillow==9.3.0
+Pillow==10.0.1