diff --git a/tools/mapmerge2/requirements.txt b/tools/mapmerge2/requirements.txt
index fb643971..ce5a9546 100644
--- a/tools/mapmerge2/requirements.txt
+++ b/tools/mapmerge2/requirements.txt
@@ -1,3 +1,3 @@
 pygit2==0.27.2
 bidict==0.13.1
-Pillow==7.1.0
+Pillow==8.1.1