diff --git a/requirements.txt b/requirements.txt
index 7bedd81..91a75a9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 black==26.5.1
 fontbakery==1.1.0
-isort==8.0.1
+isort==9.0.1
 mbake==1.4.6
 mypy==2.3.1
 opentype-sanitizer==9.2.0