diff --git a/requirements.txt b/requirements.txt
index b5838f5..9ee9d26 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ feedgen==1.0.0
 gunicorn==23.0.0
 httpx==0.27.0
 jsonpatch==1.33
-marshmallow==3.21.3
+marshmallow==3.22.0
 pytest==8.3.2
 pytest-datadir==1.5.0
 rdflib==7.0.0