diff --git a/src/node/markdown/markdown.ts b/src/node/markdown/markdown.ts
index 46cbff35..f80254a3 100644
--- a/src/node/markdown/markdown.ts
+++ b/src/node/markdown/markdown.ts
@@ -51,7 +51,7 @@ export type { Header }
 export const createMarkdownRenderer = (
   srcDir: string,
   options: MarkdownOptions = {},
-  base: string
+  base = '/'
 ): MarkdownRenderer => {
   const md = MarkdownIt({
     html: true,
diff --git a/src/node/markdownToVue.ts b/src/node/markdownToVue.ts
index 22b9eb38..c6479481 100644
--- a/src/node/markdownToVue.ts
+++ b/src/node/markdownToVue.ts
@@ -27,7 +27,7 @@ export function createMarkdownToVueRenderFn(
   pages: string[],
   userDefines: Record<string, any> | undefined,
   isBuild = false,
-  base: string,
+  base = '/',
   includeLastUpdatedData = false
 ) {
   const md = createMarkdownRenderer(srcDir, options, base)