diff --git a/package-lock.json b/package-lock.json
index 991813b..a317d67 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2437,9 +2437,9 @@
       }
     },
     "svelte": {
-      "version": "3.18.0",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.18.0.tgz",
-      "integrity": "sha512-p3V6wcxkkKbWhCwty1tZ8nh9zXNKg/fUWwdzzh38ERUDnhCodiLzIFcp8LVSBPXy1JS4qfAZfjjujobHGt6AWQ==",
+      "version": "3.49.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-3.49.0.tgz",
+      "integrity": "sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==",
       "dev": true
     },
     "terser": {
diff --git a/package.json b/package.json
index b9947f4..83977c8 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "rollup-plugin-livereload": "^1.0.0",
     "rollup-plugin-svelte": "^5.0.3",
     "rollup-plugin-terser": "^5.1.2",
-    "svelte": "^3.0.0"
+    "svelte": "^3.49.0"
   },
   "dependencies": {
     "d3": "^5.15.0",
diff --git a/yarn.lock b/yarn.lock
index 23dd2eb..0e411b5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1383,10 +1383,10 @@ supports-color@^6.1.0:
   dependencies:
     has-flag "^3.0.0"
 
-svelte@^3.0.0:
-  version "3.18.0"
-  resolved "https://registry.yarnpkg.com/svelte/-/svelte-3.18.0.tgz#39dc8314e3b0f660b945fe0e23abf65bba20a0ef"
-  integrity sha512-p3V6wcxkkKbWhCwty1tZ8nh9zXNKg/fUWwdzzh38ERUDnhCodiLzIFcp8LVSBPXy1JS4qfAZfjjujobHGt6AWQ==
+svelte@^3.49.0:
+  version "3.49.0"
+  resolved "https://registry.yarnpkg.com/svelte/-/svelte-3.49.0.tgz#5baee3c672306de1070c3b7888fc2204e36a4029"
+  integrity sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==
 
 terser@^4.6.2:
   version "4.6.3"