diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d0a95523..15968049 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -46,7 +46,7 @@ repos:
 
   # Additional Python code quality checks
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.20.0
+    rev: v3.21.2
     hooks:
       - id: pyupgrade
         args: [--py312-plus]
diff --git a/strix/report/writer.py b/strix/report/writer.py
index 8118fe9f..a7c2146d 100644
--- a/strix/report/writer.py
+++ b/strix/report/writer.py
@@ -27,7 +27,7 @@ def read_run_record(run_dir: Path) -> dict[str, Any]:
     except (OSError, json.JSONDecodeError) as exc:
         raise RuntimeError(f"run.json at {path} is unreadable: {exc}") from exc
     if not isinstance(data, dict):
-        raise RuntimeError(f"run.json at {path} is not an object")
+        raise TypeError(f"run.json at {path} is not an object")
     return data