diff --git a/pyproject.toml b/pyproject.toml
index 05295759cd..4519e4ab0e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -77,7 +77,7 @@ strict = [
     "cclib==1.8",
     "chgnet==0.3.5",
     "click==8.1.7",
-    "custodian==2024.2.15",
+    "custodian==2024.3.12",
     "dscribe==2.1.0",
     "emmet-core==0.78.0rc4",
     "ijson==3.2.3",