diff --git a/src/backend/requirements.txt b/src/backend/requirements.txt
index 86b69225..6d1430f2 100644
--- a/src/backend/requirements.txt
+++ b/src/backend/requirements.txt
@@ -97,7 +97,7 @@ isodate==0.7.2
     # via msrest
 jiter==0.8.0
     # via openai
-marshmallow==3.23.1
+marshmallow==3.26.1
     # via environs
 msal==1.31.1
     # via