diff --git a/src/Mutateful/WebUI/package-lock.json b/src/Mutateful/WebUI/package-lock.json
index 31630d3..6f4d50e 100644
--- a/src/Mutateful/WebUI/package-lock.json
+++ b/src/Mutateful/WebUI/package-lock.json
@@ -819,9 +819,9 @@
       }
     },
     "svelte": {
-      "version": "3.42.3",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.42.3.tgz",
-      "integrity": "sha512-pbdtdNZEx2GBqSM6XEgPoHbwtvWBwFLt/1bRmzsyXZO+i424wFnPe7O5B3GOJDPFSxPRztumAW3mL5LPzecWUg==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true
     },
     "svelte-check": {
diff --git a/src/Mutateful/WebUI/package.json b/src/Mutateful/WebUI/package.json
index 42b5d1c..09bb635 100644
--- a/src/Mutateful/WebUI/package.json
+++ b/src/Mutateful/WebUI/package.json
@@ -16,7 +16,7 @@
     "rollup-plugin-livereload": "^2.0.0",
     "rollup-plugin-svelte": "^7.0.0",
     "rollup-plugin-terser": "^7.0.0",
-    "svelte": "^3.0.0",
+    "svelte": "^3.49.0",
     "svelte-check": "^2.0.0",
     "svelte-preprocess": "^4.0.0",
     "@rollup/plugin-typescript": "^8.0.0",