diff --git a/pyproject.toml b/pyproject.toml
index e406fbf..1c0d062 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ authors = [{ name = "Philipp Metzner", email = "beth.aleph@yahoo.de" }]
 dependencies = [
   "appdirs==1.4.4",
   "argcomplete==3.0.8",
-  "marshmallow==3.19.0",
+  "marshmallow==3.20.1",
   "python-dateutil==2.8.2",
   "rich==13.5.2",
   "tinydb==4.8.0",