diff --git a/package.json b/package.json
index 7690773..0801fee 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
 		"@fastify/static": "^7.0.3",
 		"@mercuryworkshop/bare-as-module3": "^2.2.2",
 		"@mercuryworkshop/epoxy-transport": "^2.1.3",
-		"@mercuryworkshop/libcurl-transport": "^1.3.6",
+		"@mercuryworkshop/libcurl-transport": "^1.3.7",
 		"@rsdoctor/rspack-plugin": "^0.3.7",
 		"@rspack/cli": "^0.7.5",
 		"@rspack/core": "^0.7.5",
diff --git a/src/shared/rewriters/headers.ts b/src/shared/rewriters/headers.ts
index 8f928b2..3e28db2 100644
--- a/src/shared/rewriters/headers.ts
+++ b/src/shared/rewriters/headers.ts
@@ -37,7 +37,7 @@ export function rewriteHeaders(rawHeaders: BareHeaders, origin?: URL) {
 
 	urlHeaders.forEach((header) => {
 		if (headers[header])
-			headers[header] = encodeUrl(headers[header] as string, origin);
+			headers[header] = encodeUrl(headers[header]?.toString() as string, origin);
 	});
 
 	if (headers["link"]) {
diff --git a/src/worker/fetch.ts b/src/worker/fetch.ts
index 8ede682..d6cf939 100644
--- a/src/worker/fetch.ts
+++ b/src/worker/fetch.ts
@@ -74,7 +74,7 @@ async function handleResponse(
 			case "iframe":
 			case "document":
 				if (
-					responseHeaders["content-type"]?.toString()?.startsWith("text/html")
+					responseHeaders["content-type"]?.startsWith("text/html")
 				) {
 					responseBody = rewriteHtml(await response.text(), url);
 				} else {