diff --git a/backend/node/package-lock.json b/backend/node/package-lock.json
index 3aa3f5f..9979d0d 100644
--- a/backend/node/package-lock.json
+++ b/backend/node/package-lock.json
@@ -7,7 +7,7 @@
       "name": "sumup-examples-node",
       "dependencies": {
         "@sumup/sdk": "^0.0.11",
-        "express": "^4.21.2"
+        "express": "^5.2.1"
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@@ -186,46 +186,40 @@
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-        "negotiator": "0.6.3"
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+        "debug": "^4.4.3",
+        "http-errors": "^2.0.0",
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+        "url": "https://opencollective.com/express"
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@@ -267,15 +261,16 @@
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-      },
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+        "node": ">=18"
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+        "url": "https://opencollective.com/express"
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@@ -297,18 +292,29 @@
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+      "license": "MIT",
+      "engines": {
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-        "ms": "2.0.0"
+        "ms": "^2.1.3"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
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+        }
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@@ -320,16 +326,6 @@
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@@ -405,45 +401,42 @@
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+        "content-type": "^1.0.5",
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+        "cookie-signature": "^1.2.1",
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@@ -451,21 +444,24 @@
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-        "statuses": "~2.0.2",
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+        "type": "opencollective",
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@@ -615,6 +615,12 @@
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-      "license": "MIT"
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+      "license": "MIT",
+      "funding": {
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+        "url": "https://opencollective.com/express"
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@@ -776,39 +781,35 @@
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+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-3.0.2.tgz",
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       "license": "MIT",
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         "http-errors": "~2.0.1",
-        "iconv-lite": "~0.4.24",
+        "iconv-lite": "~0.7.0",
         "unpipe": "~1.0.0"
       },
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-        "node": ">= 0.8"
+        "node": ">= 0.10"
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-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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-      "funding": [
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-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ],
-      "license": "MIT"
+    "node_modules/router": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/router/-/router-2.2.0.tgz",
+      "integrity": "sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ==",
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+        "depd": "^2.0.0",
+        "is-promise": "^4.0.0",
+        "parseurl": "^1.3.3",
+        "path-to-regexp": "^8.0.0"
+      },
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+        "node": ">= 18"
+      }
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@@ -817,48 +818,48 @@
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-        "depd": "2.0.0",
-        "destroy": "1.2.0",
-        "encodeurl": "~2.0.0",
-        "escape-html": "~1.0.3",
-        "etag": "~1.8.1",
-        "fresh": "~0.5.2",
-        "http-errors": "~2.0.1",
-        "mime": "1.6.0",
-        "ms": "2.1.3",
-        "on-finished": "~2.4.1",
-        "range-parser": "~1.2.1",
-        "statuses": "~2.0.2"
+        "debug": "^4.4.3",
+        "encodeurl": "^2.0.0",
+        "escape-html": "^1.0.3",
+        "etag": "^1.8.1",
+        "fresh": "^2.0.0",
+        "http-errors": "^2.0.1",
+        "mime-types": "^3.0.2",
+        "ms": "^2.1.3",
+        "on-finished": "^2.4.1",
+        "range-parser": "^1.2.1",
+        "statuses": "^2.0.2"
       },
       "engines": {
-        "node": ">= 0.8.0"
+        "node": ">= 18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
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-    "node_modules/send/node_modules/ms": {
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-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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-      "license": "MIT"
-    },
     "node_modules/serve-static": {
-      "version": "1.16.3",
-      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.16.3.tgz",
-      "integrity": "sha512-x0RTqQel6g5SY7Lg6ZreMmsOzncHFU7nhnRWkKgWuMTu5NN0DR5oruckMqRvacAN9d5w6ARnRBXl9xhDCgfMeA==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-2.2.1.tgz",
+      "integrity": "sha512-xRXBn0pPqQTVQiC8wyQrKs2MOlX24zQ0POGaj0kultvoOCstBQM5yvOhAVSUwOMjQtTvsPWoNCHfPGwaaQJhTw==",
       "license": "MIT",
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-        "encodeurl": "~2.0.0",
-        "escape-html": "~1.0.3",
-        "parseurl": "~1.3.3",
-        "send": "~0.19.1"
+        "encodeurl": "^2.0.0",
+        "escape-html": "^1.0.3",
+        "parseurl": "^1.3.3",
+        "send": "^1.2.0"
       },
       "engines": {
-        "node": ">= 0.8.0"
+        "node": ">= 18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
     },
     "node_modules/setprototypeof": {
@@ -958,13 +959,14 @@
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-      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
-      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-2.0.1.tgz",
+      "integrity": "sha512-OZs6gsjF4vMp32qrCbiVSkrFmXtG/AZhY3t0iAMrMBiAZyV9oALtXO8hsrHbMXF9x6L3grlFuwW2oAz7cav+Gw==",
       "license": "MIT",
       "dependencies": {
-        "media-typer": "0.3.0",
-        "mime-types": "~2.1.24"
+        "content-type": "^1.0.5",
+        "media-typer": "^1.1.0",
+        "mime-types": "^3.0.0"
       },
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         "node": ">= 0.6"
@@ -979,15 +981,6 @@
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-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
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-      "license": "MIT",
-      "engines": {
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       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
@@ -996,6 +989,12 @@
       "engines": {
         "node": ">= 0.8"
       }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
     }
   }
 }
diff --git a/backend/node/package.json b/backend/node/package.json
index e07a1a2..0fca6c2 100644
--- a/backend/node/package.json
+++ b/backend/node/package.json
@@ -9,7 +9,7 @@
   },
   "dependencies": {
     "@sumup/sdk": "^0.0.11",
-    "express": "^4.21.2"
+    "express": "^5.2.1"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.1.2"