diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 85cce76b..893a75cf
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ Babel==1.3
 Jinja2==2.7.3
 Mako==1.0.0
 MarkupSafe==0.23
-Pillow==2.5.1
+Pillow==8.1.1
 Python-Chart==1.39
 PyYAML==3.11
 Werkzeug==0.9.6