diff --git a/package-lock.json b/package-lock.json
index c495f86..01e5b30 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -88,10 +88,16 @@
         "@types/node": "*"
       }
     },
+    "@types/content-disposition": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/@types/content-disposition/-/content-disposition-0.5.4.tgz",
+      "integrity": "sha512-0mPF08jn9zYI0n0Q/Pnz7C4kThdSt+6LD4amsrYDDpgBfrVWa3TcCOxKX1zkGgYniGagRv8heN2cbh+CAn+uuQ==",
+      "dev": true
+    },
     "@types/cookies": {
-      "version": "0.7.2",
-      "resolved": "https://registry.npmjs.org/@types/cookies/-/cookies-0.7.2.tgz",
-      "integrity": "sha512-jnihWgshWystcJKrz8C9hV+Ot9lqOUyAh2RF+o3BEo6K6AS2l4zYCb9GYaBuZ3C6Il59uIGqpE3HvCun4KKeJA==",
+      "version": "0.7.7",
+      "resolved": "https://registry.npmjs.org/@types/cookies/-/cookies-0.7.7.tgz",
+      "integrity": "sha512-h7BcvPUogWbKCzBR2lY4oqaZbO3jXZksexYJVFvkrFeLgbZjQkU4x8pRq6eg2MHXQhY0McQdqmmsxRWlVAHooA==",
       "dev": true,
       "requires": {
         "@types/connect": "*",
@@ -157,26 +163,34 @@
       }
     },
     "@types/http-assert": {
-      "version": "1.5.0",
-      "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.5.0.tgz",
-      "integrity": "sha512-8CBLG8RmxSvoY07FE6M/QpvJ7J5KzeKqF8eWN7Dq6Ks+lBTQae8Roc2G81lUu2Kw5Ju1gymOuvgyUsussbjAaA==",
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.5.1.tgz",
+      "integrity": "sha512-PGAK759pxyfXE78NbKxyfRcWYA/KwW17X290cNev/qAsn9eQIxkH4shoNBafH37wewhDG/0p1cHPbK6+SzZjWQ==",
+      "dev": true
+    },
+    "@types/http-errors": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-1.8.1.tgz",
+      "integrity": "sha512-e+2rjEwK6KDaNOm5Aa9wNGgyS9oSZU/4pfSMMPYNOfjvFI0WVXm29+ITRFr6aKDvvKo7uU1jV68MW4ScsfDi7Q==",
       "dev": true
     },
     "@types/keygrip": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/@types/keygrip/-/keygrip-1.0.1.tgz",
-      "integrity": "sha1-/1QEYtL7TQqIRBzq8n0oewHD2Hg=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@types/keygrip/-/keygrip-1.0.2.tgz",
+      "integrity": "sha512-GJhpTepz2udxGexqos8wgaBx4I/zWIDPh/KOGEwAqtuGDkOUJu5eFvwmdBX4AmB8Odsr+9pHCQqiAqDL/yKMKw==",
       "dev": true
     },
     "@types/koa": {
-      "version": "2.0.48",
-      "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.0.48.tgz",
-      "integrity": "sha512-CiIUYhHlOFJhSCTmsFoFkV2t9ij1JwW26nt0W9XZoWTvmAw6zTE0+k3IAoGICtjzIfhZpZcO323NHmI1LGmdDw==",
+      "version": "2.13.4",
+      "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.13.4.tgz",
+      "integrity": "sha512-dfHYMfU+z/vKtQB7NUrthdAEiSvnLebvBjwHtfFmpZmB7em2N3WVQdHgnFq+xvyVgxW5jKDmjWfLD3lw4g4uTw==",
       "dev": true,
       "requires": {
         "@types/accepts": "*",
+        "@types/content-disposition": "*",
         "@types/cookies": "*",
         "@types/http-assert": "*",
+        "@types/http-errors": "*",
         "@types/keygrip": "*",
         "@types/koa-compose": "*",
         "@types/node": "*"
@@ -192,9 +206,9 @@
       }
     },
     "@types/koa-compose": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/@types/koa-compose/-/koa-compose-3.2.4.tgz",
-      "integrity": "sha512-ioou0rxkuWL+yBQYsHUQAzRTfVxAg8Y2VfMftU+Y3RA03/MzuFL0x/M2sXXj3PkfnENbHsjeHR1aMdezLYpTeA==",
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/@types/koa-compose/-/koa-compose-3.2.5.tgz",
+      "integrity": "sha512-B8nG/OoE1ORZqCkBVsup/AKcvjdgoHnfi4pZMn5UwAPCbhk/96xyv284eBYW8JlQbQ7zDmnpFr68I/40mFoIBQ==",
       "dev": true,
       "requires": {
         "@types/koa": "*"
diff --git a/package.json b/package.json
index d41f425..5538129 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "devDependencies": {
     "@types/chai": "^4.1.7",
     "@types/dotenv": "^4.0.3",
-    "@types/koa": "2.0.48",
+    "@types/koa": "2.13.4",
     "@types/koa-bodyparser": "^4.2.0",
     "@types/koa-helmet": "^3.1.2",
     "@types/koa-router": "^7.0.28",