diff --git a/requirements.txt b/requirements.txt
index 80b907e..b0f4746 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ pymatgen==2024.11.13
 emmet-core==0.84.5
 pydantic==2.4.2
 pydantic-core==2.10.1
-pydantic-settings==2.2.1
+pydantic-settings==2.9.1
 typing-extensions==4.13.2
 monty==2025.3.3
 numpy==1.26.1