diff --git a/requirements.txt b/requirements.txt
index 84e80f0..c22b4fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ jaraco.functools==3.6.0
 jaraco.logging==3.1.2
 jaraco.stream==3.0.3
 jaraco.text==3.11.1
-more-itertools==9.0.0
+more-itertools==9.1.0
 multidict==6.0.4
 openttd-helpers==1.2.0
 pydantic==1.10.5