diff --git a/requirements.txt b/requirements.txt
index 07fc099..6dcd628 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 #
 appdirs==1.4.4            # via fs
 commandlines==0.4.1       # via ufolint (setup.py)
-fonttools[ufo]==4.27.1    # via ufolint (setup.py)
+fonttools[ufo]==4.39.2    # via ufolint (setup.py)
 fs==2.4.14                # via fonttools
 pytz==2021.3              # via fs
 six==1.16.0               # via fs