diff --git a/cypress/e2e/modals.cy.ts b/cypress/e2e/modals.cy.ts
index 4e3c6e6d..92d6732a 100644
--- a/cypress/e2e/modals.cy.ts
+++ b/cypress/e2e/modals.cy.ts
@@ -84,7 +84,7 @@ describe("modals", () => {
     });
 
     it("add new pmtiles source", () => {
-      let sourceId = "pmtilestest";
+      const sourceId = "pmtilestest";
       when.setValue("modal:sources.add.source_id", sourceId);
       when.select("modal:sources.add.source_type", "pmtiles_vector");
       when.setValue("modal:sources.add.source_url", "https://data.source.coop/protomaps/openstreetmap/v4.pmtiles");
diff --git a/src/components/MapMaplibreGl.tsx b/src/components/MapMaplibreGl.tsx
index e15bf506..31e08b9e 100644
--- a/src/components/MapMaplibreGl.tsx
+++ b/src/components/MapMaplibreGl.tsx
@@ -149,7 +149,7 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
       localIdeographFontFamily: false
     } satisfies MapOptions;
 
-    let protocol = new Protocol({metadata: true});
+    const protocol = new Protocol({metadata: true});
     MapLibreGl.addProtocol("pmtiles",protocol.tile);
     const map = new MapLibreGl.Map(mapOpts);