diff --git a/src/features/editor/components/ui/plus-minus-input.tsx b/src/features/editor/components/ui/plus-minus-input.tsx
index 877c958..1fc62e4 100644
--- a/src/features/editor/components/ui/plus-minus-input.tsx
+++ b/src/features/editor/components/ui/plus-minus-input.tsx
@@ -9,7 +9,7 @@ interface PlusMinusInput {
   value: number;
   onChange: (value: number) => void;
   interval?: number;
-  renderValue?: (value: number) => JSX.Element | string;
+  renderValue?: (value: number) => React.JSX.Element | string;
   delay?: number;
 }
 
diff --git a/src/hooks/use-timeout-fn.tsx b/src/hooks/use-timeout-fn.tsx
index 2b1d19b..133c0b7 100644
--- a/src/hooks/use-timeout-fn.tsx
+++ b/src/hooks/use-timeout-fn.tsx
@@ -7,7 +7,7 @@ export default function useTimeoutFn(
   ms: number = 0,
 ): UseTimeoutFnReturn {
   const ready = useRef<boolean | null>(false);
-  const timeout = useRef<ReturnType<typeof setTimeout>>();
+  const timeout = useRef<ReturnType<typeof setTimeout>>(null);
   const callback = useRef(fn);
 
   const isReady = useCallback(() => ready.current, []);