diff --git a/requirements.txt b/requirements.txt
index 5aae812..2520789 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ colorama==0.4.5
     # via rich
 commonmark==0.9.1
     # via rich
-fonttools==4.34.4
+fonttools==4.39.0
     # via fdiff (setup.py)
 idna==3.3
     # via yarl