diff --git a/src/hooks/useBluelibInBody.tsx b/src/hooks/useBluelibInBody.tsx
index e7f2c26..4470775 100644
--- a/src/hooks/useBluelibInBody.tsx
+++ b/src/hooks/useBluelibInBody.tsx
@@ -1,7 +1,8 @@
 import { useRef, useEffect } from "react"
+import { BluelibTheme } from "../types"
 import { useBluelib } from "./useBluelib"
 
-export function useBluelibInBody(theme) {
+export function useBluelibInBody(theme: BluelibTheme) {
     const ref = useRef<HTMLBodyElement | null>(null)
     useEffect(
         () => {