diff --git a/src/registral_dispersion/json_export.py b/src/registral_dispersion/json_export.py
index 72cb5e6..710097d 100644
--- a/src/registral_dispersion/json_export.py
+++ b/src/registral_dispersion/json_export.py
@@ -46,7 +46,7 @@ def _package_version() -> str:
         return "unknown"
 
 
-def _export_provenance() -> dict[str, str]:
+def _export_provenance() -> dict[str, str | bool]:
     """Software identity for reproducible exports (JSON; mirrored in CSV comments where applicable)."""
     return {
         "package_name": "registral-dispersion",
diff --git a/src/registral_dispersion/visual_theme.py b/src/registral_dispersion/visual_theme.py
index da5a57a..662c57d 100644
--- a/src/registral_dispersion/visual_theme.py
+++ b/src/registral_dispersion/visual_theme.py
@@ -45,7 +45,7 @@
 ]
 
 PLOTLY_EMBER_SCALE: list[list[float | str]] = [
-    [pos, col] for pos, col in _EMBER_STOPS  # type: ignore[misc]
+    [pos, col] for pos, col in _EMBER_STOPS
 ]
 
 FONT_SERIF = "Georgia, 'Palatino Linotype', 'Times New Roman', serif"