diff --git a/requirements.txt b/requirements.txt
index 5c4deb1..e8a0482 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ langchain-openai==0.2.9
 langchain-text-splitters==0.3.5
 langsmith==0.3.1
 markdown-it-py==3.0.0
-marshmallow==3.23.1
+marshmallow==3.26.0
 mdurl==0.1.2
 multidict==6.1.0
 mypy-extensions==1.0.0