diff --git a/requirements.txt b/requirements.txt
index 98c9c0dd..4f561c0d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ unicodecsv ; python_version < '3' and python_version >= '2.7'
 python-stdnum
 
 # GUI
-Pillow<3.5.0 ; python_version < '2.7'
+Pillow<10.0.0 ; python_version < '2.7'
 Pillow ; python_version >= '2.7'
 
 # core pagegenerators