diff --git a/requirements.txt b/requirements.txt
index e9c24a4..c89469e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ idna==2.10
 isodate==0.6.0
 lxml==4.5.2
 mf2py==1.1.2
-more-itertools==8.5.0
+more-itertools==8.13.0
 packaging==20.4
 pluggy==0.13.1
 py==1.9.0