diff --git a/tools/mapmerge2/requirements.txt b/tools/mapmerge2/requirements.txt
index 65d1a5e0b17..7a6c3f1c94f 100644
--- a/tools/mapmerge2/requirements.txt
+++ b/tools/mapmerge2/requirements.txt
@@ -1,3 +1,3 @@
 pygit2==1.0.1
 bidict==0.13.1
-Pillow==7.1.1
+Pillow==8.1.1