diff --git a/src/@types/matomo.d.ts b/src/@types/matomo.d.ts
new file mode 100644
index 0000000..781fee7
--- /dev/null
+++ b/src/@types/matomo.d.ts
@@ -0,0 +1,32 @@
+interface Dimensions {
+  dimension1?: string
+  dimension2?: string
+  dimension3?: string
+  dimension4?: string
+  dimension5?: string
+  dimension6?: string
+  dimension7?: string
+  dimension8?: string
+  dimension9?: string
+  dimension10?: string
+}
+
+declare global {
+  interface Window {
+    _paq?:
+      | (
+          | Dimensions
+          | number[]
+          | string[]
+          | number
+          | string
+          | null
+          | undefined
+        )[][]
+      | null
+  }
+}
+
+window._paq = window._paq || {}
+
+export {}
diff --git a/src/layouts/Site/index.tsx b/src/layouts/Site/index.tsx
index 641186f..541f7f9 100644
--- a/src/layouts/Site/index.tsx
+++ b/src/layouts/Site/index.tsx
@@ -14,6 +14,7 @@ export default function Site({ children }: { children: React.ReactNode }) {
 
   // init Matomo tracking
   useEffect(() => {
+    if (window._paq) return
     init({ url: meta.matomoUrl, siteId: meta.matomoSite })
   }, [])