diff --git a/materialious/src/lib/sabr/formatKeyUtils.ts b/materialious/src/lib/sabr/formatKeyUtils.ts
index f1c121bc..8bac92c4 100644
--- a/materialious/src/lib/sabr/formatKeyUtils.ts
+++ b/materialious/src/lib/sabr/formatKeyUtils.ts
@@ -58,6 +58,7 @@ export function createSegmentCacheKey(
 	if (isInit && format) {
 		return `${mediaHeader.itag}:${mediaHeader.xtags || ''}:${format.content_length || ''}:${format.mime_type || ''}`;
 	}
+	/* @ts-ignore */
 	return `${mediaHeader.startRange || '0'}-${mediaHeader.itag}-${mediaHeader.xtags || ''}`;
 }
 
diff --git a/materialious/src/lib/sabr/shakaHttpPlugin.ts b/materialious/src/lib/sabr/shakaHttpPlugin.ts
index 8d85a99b..fbeb11dc 100644
--- a/materialious/src/lib/sabr/shakaHttpPlugin.ts
+++ b/materialious/src/lib/sabr/shakaHttpPlugin.ts
@@ -51,7 +51,7 @@ export class HttpFetchPlugin {
 		const headers = new HttpFetchPlugin.Headers_();
 
 		HttpFetchPlugin.asMap(request.headers).forEach((value, key) => {
-			headers.append(key as string, value);
+			headers.append(key as string, value as string);
 		});
 
 		let sabrStreamingContext: string | null = null;