diff --git a/demo_page/package-lock.json b/demo_page/package-lock.json
index 40c9192..128395d 100644
--- a/demo_page/package-lock.json
+++ b/demo_page/package-lock.json
@@ -2469,9 +2469,9 @@
       }
     },
     "svelte": {
-      "version": "3.6.4",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.6.4.tgz",
-      "integrity": "sha512-oI2FAZK4iLUKwwf/ltn9Y9185+03LX3uMzKlVnLrkW5P1xazJnCOHBX5mI5FeyhSIPIyueTQtqJ9cQaEUMMXgA==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true
     },
     "svelte-color-picker": {
diff --git a/demo_page/package.json b/demo_page/package.json
index ffd2415..6dafbb5 100644
--- a/demo_page/package.json
+++ b/demo_page/package.json
@@ -9,7 +9,7 @@
     "rollup-plugin-node-resolve": "^4.2.3",
     "rollup-plugin-svelte": "^5.0.3",
     "rollup-plugin-terser": "^4.0.4",
-    "svelte": "^3.0.0"
+    "svelte": "^3.49.0"
   },
   "dependencies": {
     "sirv-cli": "^0.4.4",