diff --git a/siteInfo.ts b/siteInfo.ts
index b3fdd292..6d6a6153 100644
--- a/siteInfo.ts
+++ b/siteInfo.ts
@@ -7,4 +7,4 @@ const { version: defaultVersion, homepage: hp } = JSON.parse(
 export const version = process.env.VERSION ?? defaultVersion ?? Date.now()
 export const homepage = hp
 // Google Tag Manager ID
-export const GTMId = undefined // 'GTM-WF4CVFX'
+export const GTMId = 'GTM-WF4CVFX'