diff --git a/package-lock.json b/package-lock.json
index faad1de..bfbb410 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1791,6 +1791,11 @@
         "@types/node": "*"
       }
     },
+    "@types/content-disposition": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/@types/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-P1bffQfhD3O4LW0ioENXUhZ9OIa0Zn+P7M+pWgkCKaT53wVLSq0mrKksCID/FGHpFhRSxRGhgrQmfhRuzwtKdg=="
+    },
     "@types/cookies": {
       "version": "0.7.3",
       "resolved": "https://registry.npmjs.org/@types/cookies/-/cookies-0.7.3.tgz",
@@ -1901,6 +1906,11 @@
       "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.5.1.tgz",
       "integrity": "sha512-PGAK759pxyfXE78NbKxyfRcWYA/KwW17X290cNev/qAsn9eQIxkH4shoNBafH37wewhDG/0p1cHPbK6+SzZjWQ=="
     },
+    "@types/http-errors": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-1.8.0.tgz",
+      "integrity": "sha512-2aoSC4UUbHDj2uCsCxcG/vRMXey/m17bC7UwitVm5hn22nI8O8Y9iDpA76Orc+DWkQ4zZrOKEshCqR/jSuXAHA=="
+    },
     "@types/ioredis": {
       "version": "4.0.17",
       "resolved": "https://registry.npmjs.org/@types/ioredis/-/ioredis-4.0.17.tgz",
@@ -1963,22 +1973,24 @@
       "integrity": "sha1-/1QEYtL7TQqIRBzq8n0oewHD2Hg="
     },
     "@types/koa": {
-      "version": "2.0.49",
-      "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.0.49.tgz",
-      "integrity": "sha512-WQWpCH8O4Dslk8IcXfazff40aM1jXX7BQRbADIj/fKozVPu76P/wQE4sRe2SCWMn8yNkOcare2MkDrnZqLMkPQ==",
+      "version": "2.11.4",
+      "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.11.4.tgz",
+      "integrity": "sha512-Etqs0kdqbuAsNr5k6mlZQelpZKVwMu9WPRHVVTLnceZlhr0pYmblRNJbCgoCMzKWWePldydU0AYEOX4Q9fnGUQ==",
       "requires": {
         "@types/accepts": "*",
+        "@types/content-disposition": "*",
         "@types/cookies": "*",
         "@types/http-assert": "*",
+        "@types/http-errors": "*",
         "@types/keygrip": "*",
         "@types/koa-compose": "*",
         "@types/node": "*"
       }
     },
     "@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==",
       "requires": {
         "@types/koa": "*"
       }
diff --git a/package.json b/package.json
index 46a76cf..0183f1e 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "dist/app.js",
   "dependencies": {
     "@types/debug": "^4.1.4",
-    "@types/koa": "^2.0.49",
+    "@types/koa": "^2.11.4",
     "@types/koa-session": "^5.10.1",
     "@types/koa-static-server": "^1.3.0",
     "@types/koa-views": "^2.0.3",