diff --git a/backend/package-lock.json b/backend/package-lock.json
index 6df9317..ad21171 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -17,7 +17,7 @@
       "devDependencies": {
         "@cloudflare/vitest-pool-workers": "^0.5.8",
         "@cloudflare/workers-types": "^4.20240729.0",
-        "@types/express": "^4.17.21",
+        "@types/express": "^5.0.0",
         "@typescript-eslint/eslint-plugin": "^8.0.0",
         "@typescript-eslint/parser": "^8.0.0",
         "@vitest/coverage-istanbul": "^2.1.1",
@@ -3147,22 +3147,24 @@
       "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==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.0.tgz",
+      "integrity": "sha512-DvZriSMehGHL1ZNLzi6MidnsDhUZM/x2pRdDIKdwbUNqqwHxMlRdkxtn6/EPKyqKpHqTl/4nRZsRNLpZxZRpPQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@types/body-parser": "*",
-        "@types/express-serve-static-core": "^4.17.33",
+        "@types/express-serve-static-core": "^5.0.0",
         "@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==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-5.0.0.tgz",
+      "integrity": "sha512-AbXMTZGt40T+KON9/Fdxx0B2WK5hsgxcfXJLr5bFpZ7b4JCex2WyQPTEKdXqfHiY5nKKBScZ7yCoO6Pvgxfvnw==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@types/node": "*",
         "@types/qs": "*",
diff --git a/backend/package.json b/backend/package.json
index 747a7b5..61810d7 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -19,7 +19,7 @@
   "devDependencies": {
     "@cloudflare/vitest-pool-workers": "^0.5.8",
     "@cloudflare/workers-types": "^4.20240729.0",
-    "@types/express": "^4.17.21",
+    "@types/express": "^5.0.0",
     "@typescript-eslint/eslint-plugin": "^8.0.0",
     "@typescript-eslint/parser": "^8.0.0",
     "@vitest/coverage-istanbul": "^2.1.1",