diff --git a/demo_sveltekit/src/components/animations.svelte b/demo_sveltekit/src/components/animations.svelte
index dfe1b62..d695306 100644
--- a/demo_sveltekit/src/components/animations.svelte
+++ b/demo_sveltekit/src/components/animations.svelte
@@ -1,7 +1,7 @@
-<script>
+<script lang="ts">
   import Saos from "saos";
 
-  function handleObserver(x) {
+  function handleObserver(x: CustomEvent<any>) {
     console.info(x.detail.observing);
   }
 </script>
diff --git a/package.json b/package.json
index 91c06fb..a6c6a00 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "saos",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Svelte Animation on Scroll",
   "main": "index.js",
   "module": "index.mjs",