diff --git a/pyproject.toml b/pyproject.toml
index f367279410..315192e282 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -96,7 +96,7 @@ strict = [
     "monty==2024.7.30",
     "mp-api==0.41.2",
     "numpy",
-    "phonopy==2.26.7",
+    "phonopy==2.27.0",
     "pydantic-settings==2.3.4",
     "pydantic==2.8.2",
     "pymatgen-analysis-defects==2024.7.19",