diff --git a/pyproject.toml b/pyproject.toml
index 4f1d2a6..7318054 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,7 +88,7 @@ strict = [
     "inflect==7.5.0",
     "networkx==3.6.1",
     "matminer==0.10.1",
-    "monty==2026.2.18",
+    "monty==2026.5.18",
     "pubchempy==1.0.5",
     "pybtex==0.26.1",
 ]