diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 82da2a76..6310070a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -28,7 +28,7 @@ repos:
     - id: trailing-whitespace
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.14
+    rev: v0.15.4
     hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
diff --git a/myst_nb/ext/execution_tables.py b/myst_nb/ext/execution_tables.py
index 63b67137..7beaacc9 100644
--- a/myst_nb/ext/execution_tables.py
+++ b/myst_nb/ext/execution_tables.py
@@ -94,9 +94,9 @@ def run(self, **kwargs) -> None:
 }
 
 _key2transform: dict[str, Callable[[Any], str]] = {
-    "mtime": lambda x: datetime.fromtimestamp(x).strftime("%Y-%m-%d %H:%M")
-    if x
-    else "",
+    "mtime": lambda x: (
+        datetime.fromtimestamp(x).strftime("%Y-%m-%d %H:%M") if x else ""
+    ),
     "method": str,
     "runtime": lambda x: "-" if x is None else str(round(x, 2)),
     "succeeded": lambda x: "✅" if x is True else "❌",