diff --git a/frontend/src/components/ui/navigation/navigation-button.ts b/frontend/src/components/ui/navigation/navigation-button.ts
index 95fe8ddd..4d999764 100644
--- a/frontend/src/components/ui/navigation/navigation-button.ts
+++ b/frontend/src/components/ui/navigation/navigation-button.ts
@@ -101,15 +101,7 @@ export class Button extends TailwindElement {
     }
 
     if (this.type === "submit") {
-      this.submit();
-    }
-  }
-
-  private submit() {
-    const form = (this.closest("form") || this.closest("form"))!;
-
-    if (form) {
-      form.submit();
+      this.closest("form")?.submit();
     }
   }
 }
diff --git a/frontend/src/types/crawler.ts b/frontend/src/types/crawler.ts
index 194d29d7..bbf2d4e8 100644
--- a/frontend/src/types/crawler.ts
+++ b/frontend/src/types/crawler.ts
@@ -28,7 +28,7 @@ export type SeedConfig = Expand<
     pageExtraDelay: number | null;
     behaviors?: string | null;
     extraHops?: number | null;
-    useSitemap: boolean;
+    useSitemap?: boolean;
     failOnFailedSeed?: boolean;
     depth?: number | null;
     userAgent?: string | null;