diff --git a/svelte/wave-demo-2d/package-lock.json b/svelte/wave-demo-2d/package-lock.json
index d10f66c7..8cbc477a 100644
--- a/svelte/wave-demo-2d/package-lock.json
+++ b/svelte/wave-demo-2d/package-lock.json
@@ -21,7 +21,7 @@
         "rollup-plugin-livereload": "^2.0.0",
         "rollup-plugin-svelte": "^7.0.0",
         "rollup-plugin-terser": "^7.0.0",
-        "svelte": "^3.37.0"
+        "svelte": "^3.49.0"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -1012,9 +1012,9 @@
       }
     },
     "node_modules/svelte": {
-      "version": "3.37.0",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.37.0.tgz",
-      "integrity": "sha512-TRF30F4W4+d+Jr2KzUUL1j8Mrpns/WM/WacxYlo5MMb2E5Qy2Pk1Guj6GylxsW9OnKQl1tnF8q3hG/hQ3h6VUA==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true,
       "engines": {
         "node": ">= 8"
@@ -1881,9 +1881,9 @@
       }
     },
     "svelte": {
-      "version": "3.37.0",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.37.0.tgz",
-      "integrity": "sha512-TRF30F4W4+d+Jr2KzUUL1j8Mrpns/WM/WacxYlo5MMb2E5Qy2Pk1Guj6GylxsW9OnKQl1tnF8q3hG/hQ3h6VUA==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true
     },
     "svelte-canvas": {
diff --git a/svelte/wave-demo-2d/package.json b/svelte/wave-demo-2d/package.json
index a4b42dc6..1876e243 100644
--- a/svelte/wave-demo-2d/package.json
+++ b/svelte/wave-demo-2d/package.json
@@ -15,7 +15,7 @@
     "rollup-plugin-livereload": "^2.0.0",
     "rollup-plugin-svelte": "^7.0.0",
     "rollup-plugin-terser": "^7.0.0",
-    "svelte": "^3.37.0"
+    "svelte": "^3.49.0"
   },
   "dependencies": {
     "d3-array": "^2.12.1",