diff --git a/requirements/install.txt b/requirements/install.txt
index eed2862..9e3e64b 100644
--- a/requirements/install.txt
+++ b/requirements/install.txt
@@ -81,7 +81,7 @@ markupsafe==3.0.2
     #   jinja2
     #   mako
     #   werkzeug
-marshmallow==3.24.1
+marshmallow==3.26.2
     # via
     #   apispec
     #   bemserver-api (pyproject.toml)