diff --git a/package-lock.json b/package-lock.json
index f101999..73d612c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -41,7 +41,7 @@
       "devDependencies": {
         "@types/chai": "^4.2.4",
         "@types/chai-as-promised": "^7.1.2",
-        "@types/express": "^4.17.2",
+        "@types/express": "^5.0.0",
         "@types/knex": "^0.15.2",
         "@types/lodash.clonedeep": "^4.5.6",
         "@types/mocha": "^5.2.7",
@@ -75,7 +75,7 @@
         "nyc": "^14.1.1",
         "sinon": "^7.5.0",
         "supertest": "^4.0.2",
-        "typescript": "^3.7.2",
+        "typescript": "^5.0.0",
         "webmention-testpinger": "^0.7.0"
       },
       "engines": {
@@ -390,26 +390,28 @@
       "license": "MIT"
     },
     "node_modules/@types/express": {
-      "version": "4.17.2",
-      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.2.tgz",
-      "integrity": "sha512-5mHFNyavtLoJmnusB8OKJ5bshSzw+qkMIBAobLrIM48HJvunFva9mOa6aBwh64lBFyNwBbs0xiEFuj4eU/NjCA==",
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.3.tgz",
+      "integrity": "sha512-wGA0NX93b19/dZC1J18tKWVIYWyyF2ZjT9vin/NRu0qzzvfVzWjs04iq2rQ3H65vCTQYlRqs3YHfY7zjdV+9Kw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/body-parser": "*",
-        "@types/express-serve-static-core": "*",
+        "@types/express-serve-static-core": "^5.0.0",
         "@types/serve-static": "*"
       }
     },
     "node_modules/@types/express-serve-static-core": {
-      "version": "4.16.11",
-      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.16.11.tgz",
-      "integrity": "sha512-K8d2M5t3tBQimkyaYTXxtHYyoJPUEhy2/omVRnTAKw5FEdT+Ft6lTaTOpoJdHeG+mIwQXXtqiTcYZ6IR8LTzjQ==",
+      "version": "5.0.7",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-5.0.7.tgz",
+      "integrity": "sha512-R+33OsgWw7rOhD1emjU7dzCDHucJrgJXMA5PYCzJxVil0dsyx5iBEPHqpPfiKNJQb7lZ1vxwoLR4Z87bBUpeGQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/node": "*",
-        "@types/range-parser": "*"
+        "@types/qs": "*",
+        "@types/range-parser": "*",
+        "@types/send": "*"
       }
     },
     "node_modules/@types/express-serve-static-core/node_modules/@types/node": {
@@ -530,6 +532,13 @@
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       "license": "MIT"
     },
+    "node_modules/@types/qs": {
+      "version": "6.14.0",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.14.0.tgz",
+      "integrity": "sha512-eOunJqu0K1923aExK6y8p6fsihYEn/BYuQ4g0CxAAgFc4b/ZLN4CrsRZ55srTdqoiLzU2B2evC+apEIxprEzkQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/range-parser": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
@@ -557,6 +566,24 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/send": {
+      "version": "0.17.5",
+      "resolved": "https://registry.npmjs.org/@types/send/-/send-0.17.5.tgz",
+      "integrity": "sha512-z6F2D3cOStZvuk2SaP6YrwkNO65iTZcwA2ZkSABegdkAh/lf+Aa/YQndZVfmEXT5vgAp6zv06VQ3ejSVjAny4w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/mime": "^1",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/send/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,
+      "license": "MIT"
+    },
     "node_modules/@types/serve-static": {
       "version": "1.13.3",
       "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.3.tgz",
@@ -9761,9 +9788,9 @@
       "license": "MIT"
     },
     "node_modules/typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "5.9.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
+      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -9771,7 +9798,7 @@
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=4.2.0"
+        "node": ">=14.17"
       }
     },
     "node_modules/uglify-js": {
diff --git a/package.json b/package.json
index ebc34fc..7959a16 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
   "devDependencies": {
     "@types/chai": "^4.2.4",
     "@types/chai-as-promised": "^7.1.2",
-    "@types/express": "^4.17.2",
+    "@types/express": "^5.0.0",
     "@types/knex": "^0.15.2",
     "@types/lodash.clonedeep": "^4.5.6",
     "@types/mocha": "^5.2.7",
@@ -106,7 +106,7 @@
     "nyc": "^14.1.1",
     "sinon": "^7.5.0",
     "supertest": "^4.0.2",
-    "typescript": "^3.7.2",
+    "typescript": "^5.0.0",
     "webmention-testpinger": "^0.7.0"
   }
 }