diff --git a/pyproject.toml b/pyproject.toml
index 6ef1079b..ad1dbe1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ tests = [
   "coverage==7.6.4",
   "werkzeug==3.0.6",
   "flask==3.0.3",
-  "marshmallow==3.23.0",
+  "marshmallow==3.23.1",
   "webargs==8.6.0",
   "apispec==6.7.0",
   "PyYAML==6.0.2",