diff --git a/tools/mapmerge2/requirements.txt b/tools/mapmerge2/requirements.txt
index c5d38c48a0..cd00df7c47 100644
--- a/tools/mapmerge2/requirements.txt
+++ b/tools/mapmerge2/requirements.txt
@@ -1,3 +1,3 @@
 pygit2==1.0.1
 bidict==0.13.1
-Pillow==9.3.0
+Pillow==10.0.1