diff --git a/atest/requirements.txt b/atest/requirements.txt
index a20464d9f59..f88bd5c4079 100644
--- a/atest/requirements.txt
+++ b/atest/requirements.txt
@@ -4,7 +4,7 @@
 enum34; python_version < '3.0'
 pillow < 7; platform_system == 'Windows' and python_version == '2.7'
 pillow < 6; platform_system == 'Windows' and python_version == '3.4'
-pillow; platform_system == 'Windows' and python_version >= '3.5'
+pillow >= 7.1.0; platform_system == 'Windows' and python_version >= '3.5'
 
 # https://github.com/IronLanguages/ironpython2/issues/113
 docutils >= 0.9; platform_python_implementation != 'IronPython'