diff --git a/requirements.txt b/requirements.txt
index 2ecdeae..cac8b96 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 coverage==7.15.4
 Flask==3.1.3
-marshmallow==4.3.0
+marshmallow==4.3.1
 pytest==8.4.2
 specmatic==2.51.1
 testcontainers==4.15.0