diff --git a/lib/HttpClient.ts b/lib/HttpClient.ts
index 2e0f519c..2b5406cc 100644
--- a/lib/HttpClient.ts
+++ b/lib/HttpClient.ts
@@ -286,7 +286,7 @@ export class HttpClient implements ifm.IHttpClient {
                     // if there's no location to redirect to, we won't
                     break;
                 }
-                let parsedRedirectUrl = url.parse(redirectUrl);
+                let parsedRedirectUrl = new URL(redirectUrl, requestUrl);
                 if (parsedUrl.protocol == 'https:' && parsedUrl.protocol != parsedRedirectUrl.protocol && !this._allowRedirectDowngrade) {
                     throw new Error("Redirect from HTTPS to HTTP protocol. This downgrade is not allowed for security reasons. If you want to allow this behavior, set the allowRedirectDowngrade option to true.");
                 }