diff --git a/requirements.txt b/requirements.txt
index 3cda188ce00..ea3cd4a032a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ executing==2.2.1
     # via stack-data
 fastjsonschema==2.22.2
     # via nbformat
-fonttools==4.66.0
+fonttools==4.66.1
     # via matplotlib
 fsspec==2026.9.0
     # via dask