diff --git a/demo/package-lock.json b/demo/package-lock.json
index 7eb5462..9e48361 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -1984,9 +1984,9 @@
       }
     },
     "svelte": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.5.1.tgz",
-      "integrity": "sha512-iMnuyteFGQ8Yl68G/DHTHY1sLwoAMya1eS0ZOHIm/dqn2etR8WEe8hUAoluLryde4Cft4gvMhtHV3NhE60nBmQ==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true
     },
     "svelte-codemirror": {
diff --git a/demo/package.json b/demo/package.json
index 1c6e24d..d4dba64 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -20,7 +20,7 @@
   "devDependencies": {
     "npm-run-all": "^4.1.5",
     "sapper": "^0.27.0",
-    "svelte": "^3.0.0",
+    "svelte": "^3.49.0",
     "@babel/core": "^7.0.0",
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/plugin-transform-runtime": "^7.0.0",