diff --git a/package-lock.json b/package-lock.json
index 39e02d398..d9690c545 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,7 +29,7 @@
         "body-parser": "^1.20.3",
         "classnames": "^2.5.1",
         "constate": "^3.3.2",
-        "date-fns": "^3.6.0",
+        "date-fns": "^4.1.0",
         "dayjs": "^1.11.13",
         "form-data": "^4.0.0",
         "iso-datestring-validator": "^2.2.2",
@@ -57,7 +57,6 @@
         "@pmmmwh/react-refresh-webpack-plugin": "^0.5.15",
         "@sentry/webpack-plugin": "^2.22.4",
         "@svgr/webpack": "^8.1.0",
-        "@types/express": "^4.17.21",
         "@types/node": "^22.7.4",
         "@types/react-helmet": "^6.1.11",
         "@types/webpack-hot-middleware": "^2.25.9",
@@ -3203,6 +3202,15 @@
         "react": "^17.0.0 || ^18.0.0"
       }
     },
+    "node_modules/@navikt/ds-react/node_modules/date-fns": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-3.6.0.tgz",
+      "integrity": "sha512-fRHTG8g/Gif+kSh50gaGEdToemgfj74aRX3swtiouboip5JDLAyDE9F11nHMIcvOaXeOC6D7SpNhi7uFyB7Uww==",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/kossnocorp"
+      }
+    },
     "node_modules/@navikt/ds-react/node_modules/react-day-picker": {
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       "resolved": "https://registry.npmjs.org/react-day-picker/-/react-day-picker-8.10.0.tgz",
@@ -4268,30 +4276,6 @@
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       "dev": true
     },
-    "node_modules/@types/express": {
-      "version": "4.17.21",
-      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.21.tgz",
-      "integrity": "sha512-ejlPM315qwLpaQlQDTjPdsUFSc6ZsP4AN6AlWnogPjQ7CVi7PYF3YVz+CY3jE2pwYf7E/7HlDAN0rV2GxTG0HQ==",
-      "dev": true,
-      "dependencies": {
-        "@types/body-parser": "*",
-        "@types/express-serve-static-core": "^4.17.33",
-        "@types/qs": "*",
-        "@types/serve-static": "*"
-      }
-    },
-    "node_modules/@types/express-serve-static-core": {
-      "version": "4.19.5",
-      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.19.5.tgz",
-      "integrity": "sha512-y6W03tvrACO72aijJ5uF02FRq5cgDR9lUxddQ8vyF+GvmjJQqbzDcJngEjURc+ZsG31VI3hODNZJ2URj86pzmg==",
-      "dev": true,
-      "dependencies": {
-        "@types/node": "*",
-        "@types/qs": "*",
-        "@types/range-parser": "*",
-        "@types/send": "*"
-      }
-    },
     "node_modules/@types/glob": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.2.0.tgz",
@@ -4313,12 +4297,6 @@
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       "dev": true
     },
-    "node_modules/@types/http-errors": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-2.0.4.tgz",
-      "integrity": "sha512-D0CFMMtydbJAegzOyHjtiKPLlvnm3iTZyZRSZoLq2mRhDdmLfIWOCYPfQJ4cu2erKghU++QvjcUjp/5h7hESpA==",
-      "dev": true
-    },
     "node_modules/@types/http-proxy": {
       "version": "1.17.15",
       "resolved": "https://registry.npmjs.org/@types/http-proxy/-/http-proxy-1.17.15.tgz",
@@ -4363,12 +4341,6 @@
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     },
-    "node_modules/@types/mime": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz",
-      "integrity": "sha512-/pyBZWSLD2n0dcHE3hq8s8ZvcETHtEuF+3E7XVt0Ig2nvsVQXdghHVcEkIWjy9A0wKfTn97a/PSDYohKIlnP/w==",
-      "dev": true
-    },
     "node_modules/@types/minimatch": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-5.1.2.tgz",
@@ -4394,18 +4366,6 @@
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     },
-    "node_modules/@types/qs": {
-      "version": "6.9.16",
-      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.16.tgz",
-      "integrity": "sha512-7i+zxXdPD0T4cKDuxCUXJ4wHcsJLwENa6Z3dCu8cfCK743OGy5Nu1RmAGqDPsoTDINVEcdXKRvR/zre+P2Ku1A==",
-      "dev": true
-    },
-    "node_modules/@types/range-parser": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.7.tgz",
-      "integrity": "sha512-hKormJbkJqzQGhziax5PItDUTMAM9uE2XXQmM37dyd4hVM+5aVl7oVxMVUiVQn2oCQFN/LKCZdvSM0pFRqbSmQ==",
-      "dev": true
-    },
     "node_modules/@types/react": {
       "version": "18.3.10",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.10.tgz",
@@ -4459,27 +4419,6 @@
         "@types/react-router": "*"
       }
     },
-    "node_modules/@types/send": {
-      "version": "0.17.4",
-      "resolved": "https://registry.npmjs.org/@types/send/-/send-0.17.4.tgz",
-      "integrity": "sha512-x2EM6TJOybec7c52BX0ZspPodMsQUd5L6PRwOunVyVUhXiBSKf3AezDL8Dgvgt5o0UfKNfuA0eMLr2wLT4AiBA==",
-      "dev": true,
-      "dependencies": {
-        "@types/mime": "^1",
-        "@types/node": "*"
-      }
-    },
-    "node_modules/@types/serve-static": {
-      "version": "1.15.7",
-      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.15.7.tgz",
-      "integrity": "sha512-W8Ym+h8nhuRwaKPaDw34QUkwsGi6Rc4yYqvKFo5rm2FUEhCFbzVWrxXUxuKK8TASjWsysJY0nsmNCGhCOIsrOw==",
-      "dev": true,
-      "dependencies": {
-        "@types/http-errors": "*",
-        "@types/node": "*",
-        "@types/send": "*"
-      }
-    },
     "node_modules/@types/stylis": {
       "version": "4.2.5",
       "resolved": "https://registry.npmjs.org/@types/stylis/-/stylis-4.2.5.tgz",
@@ -6942,9 +6881,9 @@
       }
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     "node_modules/date-fns": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-3.6.0.tgz",
-      "integrity": "sha512-fRHTG8g/Gif+kSh50gaGEdToemgfj74aRX3swtiouboip5JDLAyDE9F11nHMIcvOaXeOC6D7SpNhi7uFyB7Uww==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.1.0.tgz",
+      "integrity": "sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg==",
       "funding": {
         "type": "github",
         "url": "https://github.com/sponsors/kossnocorp"
diff --git a/package.json b/package.json
index da9067b8a..d1edcd845 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "body-parser": "^1.20.3",
     "classnames": "^2.5.1",
     "constate": "^3.3.2",
-    "date-fns": "^3.6.0",
+    "date-fns": "^4.1.0",
     "dayjs": "^1.11.13",
     "form-data": "^4.0.0",
     "iso-datestring-validator": "^2.2.2",
@@ -84,7 +84,6 @@
     "@pmmmwh/react-refresh-webpack-plugin": "^0.5.15",
     "@sentry/webpack-plugin": "^2.22.4",
     "@svgr/webpack": "^8.1.0",
-    "@types/express": "^4.17.21",
     "@types/node": "^22.7.4",
     "@types/react-helmet": "^6.1.11",
     "@types/webpack-hot-middleware": "^2.25.9",