diff --git a/viewer-frontend/package-lock.json b/viewer-frontend/package-lock.json
index 95a6fcb..812ee66 100644
--- a/viewer-frontend/package-lock.json
+++ b/viewer-frontend/package-lock.json
@@ -21,7 +21,7 @@
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         "sanitize-html": "^2.12.1",
-        "svelte": "^3.49.0",
+        "svelte": "^4.2.19",
         "svelte-check": "^2.2.6",
         "svelte-preprocess": "^4.10.1",
         "tailwindcss": "^3.0.12",
@@ -29,6 +29,19 @@
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+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.3.0.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "@jridgewell/trace-mapping": "^0.3.24"
+      },
+      "engines": {
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+      }
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       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.12.11.tgz",
@@ -149,6 +162,54 @@
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       "dev": true
     },
+    "node_modules/@jridgewell/gen-mapping": {
+      "version": "0.3.5",
+      "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.5.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "@jridgewell/sourcemap-codec": "^1.4.10",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/set-array": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@jridgewell/set-array/-/set-array-1.2.1.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
+      "dev": true
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.25",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.25.tgz",
+      "integrity": "sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==",
+      "dev": true,
+      "dependencies": {
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+        "@jridgewell/sourcemap-codec": "^1.4.14"
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       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -184,19 +245,6 @@
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@@ -226,45 +274,65 @@
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-      "resolved": "https://registry.npmjs.org/@sveltejs/vite-plugin-svelte/-/vite-plugin-svelte-1.0.0-next.34.tgz",
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+    "node_modules/@sveltejs/kit/node_modules/@sveltejs/vite-plugin-svelte": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@sveltejs/vite-plugin-svelte/-/vite-plugin-svelte-1.4.0.tgz",
+      "integrity": "sha512-6QupI/jemMfK+yI2pMtJcu5iO2gtgTfcBdGwMZZt+lgbFELhszbDl6Qjh000HgAV8+XUA+8EY8DusOFk8WhOIg==",
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-        "debug": "^4.3.3",
-        "kleur": "^4.1.4",
-        "magic-string": "^0.25.7",
-        "require-relative": "^0.8.7",
-        "svelte-hmr": "^0.14.9"
+        "debug": "^4.3.4",
+        "deepmerge": "^4.2.2",
+        "kleur": "^4.1.5",
+        "magic-string": "^0.26.7",
+        "svelte-hmr": "^0.15.1",
+        "vitefu": "^0.2.2"
       },
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-        "node": "^14.13.1 || >= 16"
+        "node": "^14.18.0 || >= 16"
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       "peerDependencies": {
-        "diff-match-patch": "^1.0.5",
         "svelte": "^3.44.0",
-        "vite": "^2.7.0"
+        "vite": "^3.0.0"
+      }
+    },
+    "node_modules/@sveltejs/kit/node_modules/@sveltejs/vite-plugin-svelte/node_modules/vitefu": {
+      "version": "0.2.5",
+      "resolved": "https://registry.npmjs.org/vitefu/-/vitefu-0.2.5.tgz",
+      "integrity": "sha512-SgHtMLoqaeeGnd2evZ849ZbACbnwQCIwRH57t18FxcXoZop0uQu0uzlIhJBlF/eWVzuce0sHeqPcDo+evVcg8Q==",
+      "dev": true,
+      "peerDependencies": {
+        "vite": "^3.0.0 || ^4.0.0 || ^5.0.0"
       },
       "peerDependenciesMeta": {
-        "diff-match-patch": {
+        "vite": {
           "optional": true
         }
       }
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+    "node_modules/@sveltejs/kit/node_modules/magic-string": {
+      "version": "0.26.7",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.26.7.tgz",
+      "integrity": "sha512-hX9XH3ziStPoPhJxLq1syWuZMxbDvGNbVchfrdCtanC7D13888bMFow61x8axrx+GfHLtVeAx2kxL7tTGRl+Ow==",
+      "dev": true,
+      "dependencies": {
+        "sourcemap-codec": "^1.4.8"
+      },
+      "engines": {
+        "node": ">=12"
+      }
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+    "node_modules/@types/estree": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.5.tgz",
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+      "dev": true
+    },
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-      "resolved": "https://registry.npmjs.org/@types/node/-/node-17.0.10.tgz",
-      "integrity": "sha512-S/3xB4KzyFxYGCppyDt68yzBU9ysL88lSdIah4D6cptdcltc4NCPCAMc0+PCpg/lLIyC7IPvj2Z52OJWeIUkog==",
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@@ -272,9 +340,9 @@
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+      "version": "2.0.10",
+      "resolved": "https://registry.npmjs.org/@types/pug/-/pug-2.0.10.tgz",
+      "integrity": "sha512-Sk/uYFOBAB7mb74XcpizmH0KOR2Pv3D2Hmrh1Dmy5BmK3MpdSa5kqZcg6EKBdklU0bFXX9gCfzvpnyUehrPIuA==",
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@@ -287,12 +355,13 @@
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+      "version": "1.45.0",
+      "resolved": "https://registry.npmjs.org/@types/sass/-/sass-1.45.0.tgz",
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+      "deprecated": "This is a stub types definition. sass provides its own type definitions, so you do not need this installed.",
       "dev": true,
       "dependencies": {
-        "@types/node": "*"
+        "sass": "*"
       }
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
@@ -567,6 +636,15 @@
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+    "node_modules/aria-query": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/aria-query/-/aria-query-5.3.0.tgz",
+      "integrity": "sha512-b0P0sZPKtyu8HkeRAfCq0IfURZK+SuwMjY1UXGBU27wpAiTwQAIlq56IbIO+ytk/JjS1fMR14ee5WBBfKi5J6A==",
+      "dev": true,
+      "dependencies": {
+        "dequal": "^2.0.3"
+      }
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     "node_modules/array-union": {
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@@ -612,6 +690,15 @@
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+    "node_modules/axobject-query": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-4.1.0.tgz",
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+      "dev": true,
+      "engines": {
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@@ -806,6 +893,31 @@
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+      "resolved": "https://registry.npmjs.org/code-red/-/code-red-1.0.4.tgz",
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+      "dev": true,
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+        "@types/estree": "^1.0.1",
+        "acorn": "^8.10.0",
+        "estree-walker": "^3.0.3",
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+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.1.tgz",
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+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
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@@ -857,6 +969,19 @@
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+      "dev": true,
+      "dependencies": {
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+        "source-map-js": "^1.0.1"
+      },
+      "engines": {
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+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.6.tgz",
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@@ -907,6 +1032,15 @@
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+      "resolved": "https://registry.npmjs.org/dequal/-/dequal-2.0.3.tgz",
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@@ -1680,10 +1814,13 @@
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-      "dev": true
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@@ -1959,6 +2096,12 @@
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@@ -2078,6 +2221,15 @@
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+      "resolved": "https://registry.npmjs.org/is-reference/-/is-reference-3.0.2.tgz",
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@@ -2419,6 +2583,17 @@
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+      "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-3.1.0.tgz",
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@@ -2858,6 +3028,23 @@
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@@ -3179,6 +3386,27 @@
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@@ -3480,6 +3708,16 @@
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+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.25.tgz",
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+        "magic-string": {
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+          "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.26.7.tgz",
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-      "integrity": "sha512-bKE9+4qb4sAnA+TKHiYurUl970rjA0XmlP9TEP7K/ncyWz3m81kA4HOgmlZK/7irGK7gzZlaPDI3cmf8fp/+tg==",
+      "version": "0.15.3",
+      "resolved": "https://registry.npmjs.org/svelte-hmr/-/svelte-hmr-0.15.3.tgz",
+      "integrity": "sha512-41snaPswvSf8TJUhlkoJBekRrABDXDMdpNpT2tfHIv4JuhgvHqLMhEPGtaQn0BmbNSTkuz2Ed20DF2eHw0SmBQ==",
       "dev": true,
       "requires": {}
     },
     "svelte-preprocess": {
-      "version": "4.10.2",
-      "resolved": "https://registry.npmjs.org/svelte-preprocess/-/svelte-preprocess-4.10.2.tgz",
-      "integrity": "sha512-aPpkCreSo8EL/y8kJSa1trhiX0oyAtTjlNNM7BNjRAsMJ8Yy2LtqHt0zyd4pQPXt+D4PzbO3qTjjio3kwOxDlA==",
+      "version": "4.10.7",
+      "resolved": "https://registry.npmjs.org/svelte-preprocess/-/svelte-preprocess-4.10.7.tgz",
+      "integrity": "sha512-sNPBnqYD6FnmdBrUmBCaqS00RyCsCpj2BG58A1JBswNF7b0OKviwxqVrOL/CKyJrLSClrSeqQv5BXNg2RUbPOw==",
       "dev": true,
       "requires": {
         "@types/pug": "^2.0.4",
@@ -5608,6 +6017,17 @@
         "magic-string": "^0.25.7",
         "sorcery": "^0.10.0",
         "strip-indent": "^3.0.0"
+      },
+      "dependencies": {
+        "magic-string": {
+          "version": "0.25.9",
+          "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.25.9.tgz",
+          "integrity": "sha512-RmF0AsMzgt25qzqqLc1+MbHmhdx0ojF2Fvs4XnOqz2ZOBXzzkEwc/dJQZCYHAn7v1jbVOjAZfK8msRn4BxO4VQ==",
+          "dev": true,
+          "requires": {
+            "sourcemap-codec": "^1.4.8"
+          }
+        }
       }
     },
     "table": {
diff --git a/viewer-frontend/package.json b/viewer-frontend/package.json
index 60e2cfb..c812102 100644
--- a/viewer-frontend/package.json
+++ b/viewer-frontend/package.json
@@ -21,7 +21,7 @@
     "eslint-plugin-svelte3": "^3.2.1",
     "postcss": "^8.4.31",
     "sanitize-html": "^2.12.1",
-    "svelte": "^3.49.0",
+    "svelte": "^4.2.19",
     "svelte-check": "^2.2.6",
     "svelte-preprocess": "^4.10.1",
     "tailwindcss": "^3.0.12",