diff --git a/package-lock.json b/package-lock.json
index 06fe044..cdc3c4b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4664,12 +4664,36 @@
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     },
     "http-assert": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/http-assert/-/http-assert-1.4.0.tgz",
-      "integrity": "sha512-tPVv62a6l3BbQoM/N5qo969l0OFxqpnQzNUPeYfTP6Spo4zkgWeDBD1D5thI7sDLg7jCCihXTLB0X8UtdyAy8A==",
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/http-assert/-/http-assert-1.4.1.tgz",
+      "integrity": "sha512-rdw7q6GTlibqVVbXr0CKelfV5iY8G2HqEUkhSk297BMbSpSL8crXC+9rjKoMcZZEsksX30le6f/4ul4E28gegw==",
       "requires": {
         "deep-equal": "~1.0.1",
-        "http-errors": "~1.7.1"
+        "http-errors": "~1.7.2"
+      },
+      "dependencies": {
+        "http-errors": {
+          "version": "1.7.3",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.3.tgz",
+          "integrity": "sha512-ZTTX0MWrsQ2ZAhA1cejAwDLycFsd7I7nVtnkT3Ol0aqodaKW+0CTZDQ1uBv5whptCnc8e8HeRRJxRs0kmm/Qfw==",
+          "requires": {
+            "depd": "~1.1.2",
+            "inherits": "2.0.4",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
+          }
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "setprototypeof": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+          "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw=="
+        }
       }
     },
     "http-errors": {
@@ -5453,9 +5477,9 @@
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     "koa": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/koa/-/koa-2.7.0.tgz",
-      "integrity": "sha512-7ojD05s2Q+hFudF8tDLZ1CpCdVZw8JQELWSkcfG9bdtoTDzMmkRF6BQBU7JzIzCCOY3xd3tftiy/loHBUYaY2Q==",
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/koa/-/koa-2.8.1.tgz",
+      "integrity": "sha512-iCgjRkntcVud5amnioi+79r7TPVhKPfCY8UzL9GjyU+nIWTE9xsqyrJ6kib3InT9JYRyUu9Y67i5apCjf997TQ==",
       "requires": {
         "accepts": "^1.3.5",
         "cache-content-type": "^1.0.0",
@@ -6801,9 +6825,9 @@
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     },
     "parseurl": {
-      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.2.tgz",
-      "integrity": "sha1-/CidTtiZMRlGDBViUyYs3I3mW/M="
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
+      "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
     },
     "pascalcase": {
       "version": "0.1.1",
@@ -8736,12 +8760,27 @@
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     "type-is": {
-      "version": "1.6.16",
-      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
-      "integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
       "requires": {
         "media-typer": "0.3.0",
-        "mime-types": "~2.1.18"
+        "mime-types": "~2.1.24"
+      },
+      "dependencies": {
+        "mime-db": {
+          "version": "1.40.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
+          "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA=="
+        },
+        "mime-types": {
+          "version": "2.1.24",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.24.tgz",
+          "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
+          "requires": {
+            "mime-db": "1.40.0"
+          }
+        }
       }
     },
     "typedarray": {
diff --git a/package.json b/package.json
index efa329e..6e5fe11 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "browserify": "^16.5.0",
     "dog-names": "^2.0.0",
     "ioredis": "^4.14.0",
-    "koa": "^2.7.0",
+    "koa": "^2.8.1",
     "koa-router": "^7.4.0",
     "koa-static": "^5.0.0",
     "mz": "^2.7.0",