diff --git a/www/utils/packages/typedoc-plugin-markdown-medusa/src/resources/helpers/frontmatter.ts b/www/utils/packages/typedoc-plugin-markdown-medusa/src/resources/helpers/frontmatter.ts
index e1d5f289f9c26..ac80604a4e900 100644
--- a/www/utils/packages/typedoc-plugin-markdown-medusa/src/resources/helpers/frontmatter.ts
+++ b/www/utils/packages/typedoc-plugin-markdown-medusa/src/resources/helpers/frontmatter.ts
@@ -38,10 +38,12 @@ function resolveFrontmatterVariables(
   frontmatterData: FrontmatterData,
   reflection: Reflection
 ): FrontmatterData {
-  const tempFrontmatterData = Object.assign({}, frontmatterData)
+  const tempFrontmatterData: FrontmatterData = JSON.parse(
+    JSON.stringify(frontmatterData)
+  )
   Object.keys(tempFrontmatterData).forEach((key) => {
     const value = tempFrontmatterData[key]
-    if (!value) {
+    if (!value || typeof value !== "string") {
       return
     }
 
diff --git a/www/utils/packages/types/lib/index.d.ts b/www/utils/packages/types/lib/index.d.ts
index 9b2cc6ad2c553..9736fb648ea58 100644
--- a/www/utils/packages/types/lib/index.d.ts
+++ b/www/utils/packages/types/lib/index.d.ts
@@ -55,7 +55,7 @@ export type FrontmatterData = {
   sidebar_label?: string
   displayed_sidebar?: string
   tags?: string[]
-  [k: string]: string
+  [k: string]: unknown
 }
 
 export type FormattingOptionType = {