diff --git a/setup.py b/setup.py
index 77acf4f..a19f301 100644
--- a/setup.py
+++ b/setup.py
@@ -69,7 +69,7 @@ def version_read():
     platforms=["any"],
     packages=find_packages("lib"),
     package_dir={"": "lib"},
-    install_requires=["commandlines", "fontTools[ufo]>=3.31.0"],
+    install_requires=["commandlines", "fontTools[ufo]>=4.18.0"],
     entry_points={
         "console_scripts": ["ufolint = ufolint.app:main"],
     },