diff --git a/src/public/shared/UrlBuilder.ts b/src/public/shared/UrlBuilder.ts
index 70d93a0..e801d4f 100644
--- a/src/public/shared/UrlBuilder.ts
+++ b/src/public/shared/UrlBuilder.ts
@@ -86,11 +86,13 @@ export class UrlBuilder {
       {
         cache: null,
         cacheTtl: null,
+        cacheTtlNotFound: null,
         version: null,
         forceDownloadPrompt: null
       },
       {
         cacheTtl: "cache_ttl",
+        cacheTtlNotFound: "cache_ttl_not_found",
         forceDownloadPrompt: "download"
       }
     )(params);
diff --git a/src/public/shared/UrlBuilderTypes.ts b/src/public/shared/UrlBuilderTypes.ts
index 391b8fa..de6daff 100644
--- a/src/public/shared/UrlBuilderTypes.ts
+++ b/src/public/shared/UrlBuilderTypes.ts
@@ -61,6 +61,13 @@ export interface NonDeprecatedCommonQueryParams {
    */
   cacheTtl?: number;
 
+  /**
+   * Specifies the maximum amount of time, in seconds, that 404 responses will be cached in the Bytescale CDN's edge cache.
+   *
+   * Default: Please refer to your account's default cache settings in the Bytescale Dashboard.
+   */
+  cacheTtlNotFound?: number;
+
   /**
    * Forces the browser to display a download prompt for the file, instead of displaying the file in the browser.
    *