diff --git a/package-lock.json b/package-lock.json
index 14dbc06..7a8d7c7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,15 @@
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@@ -2011,6 +2020,40 @@
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+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.19.tgz",
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@@ -2210,6 +2253,14 @@
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+      "resolved": "https://registry.npmjs.org/aria-query/-/aria-query-5.3.0.tgz",
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+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-3.2.1.tgz",
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@@ -2931,6 +2990,38 @@
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+      "resolved": "https://registry.npmjs.org/code-red/-/code-red-1.0.4.tgz",
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+      "requires": {
+        "@jridgewell/sourcemap-codec": "^1.4.15",
+        "@types/estree": "^1.0.1",
+        "acorn": "^8.10.0",
+        "estree-walker": "^3.0.3",
+        "periscopic": "^3.1.0"
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+          "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.1.tgz",
+          "integrity": "sha512-LG4opVs2ANWZ1TJoKc937iMmNstM/d0ae1vNbnBvBhqCSezgVUOzcLCqbI5elV8Vy6WKwKjaqR+zO9VKirBBCA=="
+        },
+        "acorn": {
+          "version": "8.10.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.10.0.tgz",
+          "integrity": "sha512-F0SAmZ8iUtS//m8DmCTA0jlh6TDKkHQyK6xc6V4KDTyZKA9dnvX9/3sRTVQrWm79glUAZbnmmNcdYwUIHWVybw=="
+        },
+        "estree-walker": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
+          "integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
+          "requires": {
+            "@types/estree": "^1.0.0"
+          }
+        }
+      }
+    },
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@@ -3675,6 +3766,15 @@
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+    "css-tree": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-2.3.1.tgz",
+      "integrity": "sha512-6Fv1DV/TYw//QF5IzQdqsNDjx/wc8TrMBZsqjL9eW01tWb7R7k/mq+/VXfJCl7SoD5emsJop9cOByJZfs8hYIw==",
+      "requires": {
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+        "source-map-js": "^1.0.1"
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@@ -3858,6 +3958,11 @@
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+      "resolved": "https://registry.npmjs.org/dequal/-/dequal-2.0.3.tgz",
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+    },
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       "resolved": "https://registry.npmjs.org/detab/-/detab-2.0.4.tgz",
@@ -6715,6 +6820,14 @@
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       "integrity": "sha1-eaKp7OfwlugPNtKy87wWwf9L8/o="
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+    "is-reference": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/is-reference/-/is-reference-3.0.1.tgz",
+      "integrity": "sha512-baJJdQLiYaJdvFbJqXrcGv3WU3QCzBlUcI5QhbesIm6/xPsvmO+2CDoi/GMOFBQEQm+PXkwOPrp9KK5ozZsp2w==",
+      "requires": {
+        "@types/estree": "*"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/is-relative/-/is-relative-1.0.0.tgz",
@@ -7106,6 +7219,11 @@
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+    "locate-character": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/locate-character/-/locate-character-3.0.0.tgz",
+      "integrity": "sha512-SW13ws7BjaeJ6p7Q6CO2nchbYEc3X3J6WrmTTDto7yMPqVSZTUyY5Tjbid+Ab8gLnATtygYtiDIJGQRRn2ZOiA=="
+    },
     "locate-path": {
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       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
@@ -7401,6 +7519,11 @@
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+    "mdn-data": {
+      "version": "2.0.30",
+      "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-2.0.30.tgz",
+      "integrity": "sha512-GaqWWShW4kv/G9IEucWScBx9G1/vsFZZJUO+tD26M8J8z3Kw5RDQjaoZe03YAClgeS/SWPOcb4nkFBTEi5DUEA=="
+    },
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       "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-1.0.1.tgz",
@@ -8752,6 +8875,31 @@
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       "dev": true
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+    "periscopic": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-3.1.0.tgz",
+      "integrity": "sha512-vKiQ8RRtkl9P+r/+oefh25C3fhybptkHKCZSPlcXiJux2tJF55GnEj3BVn4A5gKfq9NWWXXrxkHBwVPUfH0opw==",
+      "requires": {
+        "@types/estree": "^1.0.0",
+        "estree-walker": "^3.0.0",
+        "is-reference": "^3.0.0"
+      },
+      "dependencies": {
+        "@types/estree": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.1.tgz",
+          "integrity": "sha512-LG4opVs2ANWZ1TJoKc937iMmNstM/d0ae1vNbnBvBhqCSezgVUOzcLCqbI5elV8Vy6WKwKjaqR+zO9VKirBBCA=="
+        },
+        "estree-walker": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
+          "integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
+          "requires": {
+            "@types/estree": "^1.0.0"
+          }
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+      }
+    },
     "picomatch": {
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       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.2.2.tgz",
@@ -9840,7 +9988,8 @@
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         "kind-of": {
           "version": "6.0.2",
-          "resolved": ""
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA=="
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@@ -10176,6 +10325,11 @@
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       "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
     },
+    "source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw=="
+    },
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       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.2.tgz",
@@ -10622,9 +10776,52 @@
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-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-2.16.1.tgz",
-      "integrity": "sha512-TpXdfukSkmWkMnH6PPVm7FRW8SSFcTyqBiP+6VN8rtZJ7Lp1Xbf/e3oz73eQBxF0UPZw1aAn1b91lX2XTeD3zg=="
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-4.2.0.tgz",
+      "integrity": "sha512-kVsdPjDbLrv74SmLSUzAsBGquMs4MPgWGkGLpH+PjOYnFOziAvENVzgJmyOCV2gntxE32aNm8/sqNKD6LbIpeQ==",
+      "requires": {
+        "@ampproject/remapping": "^2.2.1",
+        "@jridgewell/sourcemap-codec": "^1.4.15",
+        "@jridgewell/trace-mapping": "^0.3.18",
+        "acorn": "^8.9.0",
+        "aria-query": "^5.3.0",
+        "axobject-query": "^3.2.1",
+        "code-red": "^1.0.3",
+        "css-tree": "^2.3.1",
+        "estree-walker": "^3.0.3",
+        "is-reference": "^3.0.1",
+        "locate-character": "^3.0.0",
+        "magic-string": "^0.30.0",
+        "periscopic": "^3.1.0"
+      },
+      "dependencies": {
+        "@types/estree": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.1.tgz",
+          "integrity": "sha512-LG4opVs2ANWZ1TJoKc937iMmNstM/d0ae1vNbnBvBhqCSezgVUOzcLCqbI5elV8Vy6WKwKjaqR+zO9VKirBBCA=="
+        },
+        "acorn": {
+          "version": "8.10.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.10.0.tgz",
+          "integrity": "sha512-F0SAmZ8iUtS//m8DmCTA0jlh6TDKkHQyK6xc6V4KDTyZKA9dnvX9/3sRTVQrWm79glUAZbnmmNcdYwUIHWVybw=="
+        },
+        "estree-walker": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
+          "integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
+          "requires": {
+            "@types/estree": "^1.0.0"
+          }
+        },
+        "magic-string": {
+          "version": "0.30.2",
+          "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.2.tgz",
+          "integrity": "sha512-lNZdu7pewtq/ZvWUp9Wpf/x7WzMTsR26TWV03BRZrXFsv+BI6dy8RAiKgm1uM/kyR0rCfUcqvOlXKG66KhIGug==",
+          "requires": {
+            "@jridgewell/sourcemap-codec": "^1.4.15"
+          }
+        }
+      }
     },
     "symbol-tree": {
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diff --git a/package.json b/package.json
index 5b0dbb0..b859d02 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
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     "rollup-plugin-svelte": "^5.0.1",
     "stylus": "^0.54.7",
-    "svelte": "2.16.1",
+    "svelte": "4.2.0",
     "uglify-js": "^3.4.9",
     "yargs-parser": "^20.2.4"
   },