diff --git a/src/components/sprites/Character.vue b/src/components/sprites/Character.vue
index 8e40e25..0127613 100644
--- a/src/components/sprites/Character.vue
+++ b/src/components/sprites/Character.vue
@@ -123,7 +123,7 @@ watch(
   { immediate: true, deep: true }
 )
 
-const calcDirection = (oldX, oldY, newX, newY) => {
+const calcDirection = (oldX: number, oldY: number, newX: number, newY: number) => {
   if (newY < oldY || newX < oldX) {
     return Direction.NEGATIVE
   }