diff --git a/package.json b/package.json
index c17fbac..a267400 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "dependencies": {
         "body-parser": "^1.16.1",
         "chai": "^3.5.0",
-        "express": "^4.14.1",
+        "express": "^4.17.3",
         "jsonwebtoken": "^7.3.0",
         "mocha": "^3.2.0",
         "sinon": "^1.17.7",
diff --git a/yarn.lock b/yarn.lock
index c8aa130..4127fe4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,12 +2,12 @@
 # yarn lockfile v1
 
 
-accepts@~1.3.3:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.3.tgz#c3ca7434938648c3e0d9c1e328dd68b622c284ca"
+accepts@~1.3.8:
+  version "1.3.8"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.8.tgz#0bf0be125b67014adcb0b0921e62db7bffe16b2e"
   dependencies:
-    mime-types "~2.1.11"
-    negotiator "0.6.1"
+    mime-types "~2.1.34"
+    negotiator "0.6.3"
 
 array-flatten@1.1.1:
   version "1.1.1"
@@ -29,20 +29,20 @@ base64url@2.0.0, base64url@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/base64url/-/base64url-2.0.0.tgz#eac16e03ea1438eff9423d69baa36262ed1f70bb"
 
-body-parser@^1.16.1:
-  version "1.16.1"
-  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.16.1.tgz#51540d045adfa7a0c6995a014bb6b1ed9b802329"
+body-parser@1.19.2, body-parser@^1.16.1:
+  version "1.19.2"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.2.tgz#4714ccd9c157d44797b8b5607d72c0b89952f26e"
   dependencies:
-    bytes "2.4.0"
-    content-type "~1.0.2"
-    debug "2.6.1"
-    depd "~1.1.0"
-    http-errors "~1.5.1"
-    iconv-lite "0.4.15"
+    bytes "3.1.2"
+    content-type "~1.0.4"
+    debug "2.6.9"
+    depd "~1.1.2"
+    http-errors "1.8.1"
+    iconv-lite "0.4.24"
     on-finished "~2.3.0"
-    qs "6.2.1"
-    raw-body "~2.2.0"
-    type-is "~1.6.14"
+    qs "6.9.7"
+    raw-body "2.4.3"
+    type-is "~1.6.18"
 
 brace-expansion@^1.0.0:
   version "1.1.6"
@@ -63,9 +63,9 @@ buffer-shims@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/buffer-shims/-/buffer-shims-1.0.0.tgz#9978ce317388c649ad8793028c3477ef044a8b51"
 
-bytes@2.4.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.4.0.tgz#7d97196f9d5baf7f6935e25985549edd2a6c2339"
+bytes@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.2.tgz#8b0beeb98605adf1b128fa4386403c009e0221a5"
 
 chai@^3.5.0:
   version "3.5.0"
@@ -95,21 +95,23 @@ concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
-content-disposition@0.5.2:
-  version "0.5.2"
-  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
+content-disposition@0.5.4:
+  version "0.5.4"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.4.tgz#8b82b4efac82512a02bb0b1dcec9d2c5e8eb5bfe"
+  dependencies:
+    safe-buffer "5.2.1"
 
-content-type@~1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.2.tgz#b7d113aee7a8dd27bd21133c4dc2529df1721eed"
+content-type@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
 
 cookie-signature@1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
 
-cookie@0.3.1:
-  version "0.3.1"
-  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
+cookie@0.4.2:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.2.tgz#0e41f24de5ecf317947c82fc789e06a884824432"
 
 cookiejar@^2.0.6:
   version "2.1.0"
@@ -119,17 +121,17 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-debug@2.2.0, debug@^2.2.0, debug@~2.2.0:
+debug@2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
   dependencies:
     ms "0.7.1"
 
-debug@2.6.1:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.1.tgz#79855090ba2c4e3115cc7d8769491d58f0491351"
+debug@2.6.9, debug@^2.2.0:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
-    ms "0.7.2"
+    ms "2.0.0"
 
 deep-eql@^0.1.3:
   version "0.1.3"
@@ -141,9 +143,9 @@ delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
 
-depd@~1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.0.tgz#e1bd82c6aab6ced965b97b88b17ed3e528ca18c3"
+depd@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
 
 destroy@~1.0.4:
   version "1.0.4"
@@ -164,9 +166,9 @@ ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
 
-encodeurl@~1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.1.tgz#79e3d58655346909fe6f0f45a5de68103b294d20"
+encodeurl@~1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
 
 escape-html@~1.0.3:
   version "1.0.3"
@@ -176,53 +178,59 @@ escape-string-regexp@1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
-etag@~1.7.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/etag/-/etag-1.7.0.tgz#03d30b5f67dd6e632d2945d30d6652731a34d5d8"
+etag@~1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
 
-express@^4.14.1:
-  version "4.14.1"
-  resolved "https://registry.yarnpkg.com/express/-/express-4.14.1.tgz#646c237f766f148c2120aff073817b9e4d7e0d33"
+express@^4.17.3:
+  version "4.17.3"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.17.3.tgz#f6c7302194a4fb54271b73a1fe7a06478c8f85a1"
   dependencies:
-    accepts "~1.3.3"
+    accepts "~1.3.8"
     array-flatten "1.1.1"
-    content-disposition "0.5.2"
-    content-type "~1.0.2"
-    cookie "0.3.1"
+    body-parser "1.19.2"
+    content-disposition "0.5.4"
+    content-type "~1.0.4"
+    cookie "0.4.2"
     cookie-signature "1.0.6"
-    debug "~2.2.0"
-    depd "~1.1.0"
-    encodeurl "~1.0.1"
+    debug "2.6.9"
+    depd "~1.1.2"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    etag "~1.7.0"
-    finalhandler "0.5.1"
-    fresh "0.3.0"
+    etag "~1.8.1"
+    finalhandler "~1.1.2"
+    fresh "0.5.2"
     merge-descriptors "1.0.1"
     methods "~1.1.2"
     on-finished "~2.3.0"
-    parseurl "~1.3.1"
+    parseurl "~1.3.3"
     path-to-regexp "0.1.7"
-    proxy-addr "~1.1.3"
-    qs "6.2.0"
-    range-parser "~1.2.0"
-    send "0.14.2"
-    serve-static "~1.11.2"
-    type-is "~1.6.14"
-    utils-merge "1.0.0"
-    vary "~1.1.0"
+    proxy-addr "~2.0.7"
+    qs "6.9.7"
+    range-parser "~1.2.1"
+    safe-buffer "5.2.1"
+    send "0.17.2"
+    serve-static "1.14.2"
+    setprototypeof "1.2.0"
+    statuses "~1.5.0"
+    type-is "~1.6.18"
+    utils-merge "1.0.1"
+    vary "~1.1.2"
 
 extend@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.0.tgz#5a474353b9f3353ddd8176dfd37b91c83a46f1d4"
 
-finalhandler@0.5.1:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-0.5.1.tgz#2c400d8d4530935bc232549c5fa385ec07de6fcd"
+finalhandler@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.2.tgz#b7e7d000ffd11938d0fdb053506f6ebabe9f587d"
   dependencies:
-    debug "~2.2.0"
+    debug "2.6.9"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
     on-finished "~2.3.0"
-    statuses "~1.3.1"
+    parseurl "~1.3.3"
+    statuses "~1.5.0"
     unpipe "~1.0.0"
 
 form-data@^2.1.1:
@@ -243,13 +251,13 @@ formidable@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/formidable/-/formidable-1.1.1.tgz#96b8886f7c3c3508b932d6bd70c4d3a88f35f1a9"
 
-forwarded@~0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.0.tgz#19ef9874c4ae1c297bcf078fde63a09b66a84363"
+forwarded@0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.2.0.tgz#2269936428aad4c15c7ebe9779a84bf0b2a81811"
 
-fresh@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.3.0.tgz#651f838e22424e7566de161d8358caa199f83d4f"
+fresh@0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
 
 fs.realpath@^1.0.0:
   version "1.0.0"
@@ -282,17 +290,21 @@ hoek@2.x.x:
   version "2.16.3"
   resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"
 
-http-errors@~1.5.1:
-  version "1.5.1"
-  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.5.1.tgz#788c0d2c1de2c81b9e6e8c01843b6b97eb920750"
+http-errors@1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.8.1.tgz#7c3f28577cbc8a207388455dbd62295ed07bd68c"
   dependencies:
-    inherits "2.0.3"
-    setprototypeof "1.0.2"
-    statuses ">= 1.3.1 < 2"
+    depd "~1.1.2"
+    inherits "2.0.4"
+    setprototypeof "1.2.0"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.1"
 
-iconv-lite@0.4.15:
-  version "0.4.15"
-  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.15.tgz#fe265a218ac6a57cfe854927e9d04c19825eddeb"
+iconv-lite@0.4.24:
+  version "0.4.24"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
 
 inflight@^1.0.4:
   version "1.0.6"
@@ -301,7 +313,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@2.0.3, inherits@~2.0.1:
+inherits@2, inherits@~2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
@@ -309,9 +321,13 @@ inherits@2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
 
-ipaddr.js@1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.2.0.tgz#8aba49c9192799585bdd643e0ccb50e8ae777ba4"
+inherits@2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+
+ipaddr.js@1.9.1:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.1.tgz#bff38543eeb8984825079ff3a2a8e6cbd46781b3"
 
 isarray@~1.0.0:
   version "1.0.0"
@@ -428,17 +444,31 @@ methods@^1.1.1, methods@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
 
+mime-db@1.52.0:
+  version "1.52.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.52.0.tgz#bbabcdc02859f4987301c856e3387ce5ec43bf70"
+
 mime-db@~1.26.0:
   version "1.26.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.26.0.tgz#eaffcd0e4fc6935cf8134da246e2e6c35305adff"
 
-mime-types@^2.1.12, mime-types@~2.1.11, mime-types@~2.1.13:
+mime-types@^2.1.12:
   version "2.1.14"
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.14.tgz#f7ef7d97583fcaf3b7d282b6f8b5679dab1e94ee"
   dependencies:
     mime-db "~1.26.0"
 
-mime@1.3.4, mime@^1.3.4:
+mime-types@~2.1.24, mime-types@~2.1.34:
+  version "2.1.35"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.35.tgz#381a871b62a734450660ae3deee44813f70d959a"
+  dependencies:
+    mime-db "1.52.0"
+
+mime@1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+
+mime@^1.3.4:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
 
@@ -482,13 +512,21 @@ ms@0.7.1:
   version "0.7.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"
 
-ms@0.7.2, ms@^0.7.1:
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+
+ms@2.1.3:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
+
+ms@^0.7.1:
   version "0.7.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.2.tgz#ae25cf2512b3885a1d95d7f037868d8431124765"
 
-negotiator@0.6.1:
-  version "0.6.1"
-  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
+negotiator@0.6.3:
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.3.tgz#58e323a72fedc0d6f9cd4d31fe49f51479590ccd"
 
 on-finished@~2.3.0:
   version "2.3.0"
@@ -502,9 +540,9 @@ once@^1.3.0:
   dependencies:
     wrappy "1"
 
-parseurl@~1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.1.tgz#c8ab8c9223ba34888aa64a297b28853bec18da56"
+parseurl@~1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
 
 path-is-absolute@^1.0.0:
   version "1.0.1"
@@ -518,31 +556,28 @@ process-nextick-args@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
 
-proxy-addr@~1.1.3:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-1.1.3.tgz#dc97502f5722e888467b3fa2297a7b1ff47df074"
+proxy-addr@~2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.7.tgz#f19fe69ceab311eeb94b42e70e8c2070f9ba1025"
   dependencies:
-    forwarded "~0.1.0"
-    ipaddr.js "1.2.0"
-
-qs@6.2.0, qs@^6.1.0:
-  version "6.2.0"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.0.tgz#3b7848c03c2dece69a9522b0fae8c4126d745f3b"
+    forwarded "0.2.0"
+    ipaddr.js "1.9.1"
 
-qs@6.2.1:
-  version "6.2.1"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.1.tgz#ce03c5ff0935bc1d9d69a9f14cbd18e568d67625"
+qs@6.9.7, qs@^6.1.0:
+  version "6.9.7"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.9.7.tgz#4610846871485e1e048f44ae3b94033f0e675afe"
 
-range-parser@~1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.0.tgz#f49be6b487894ddc40dcc94a322f611092e00d5e"
+range-parser@~1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
 
-raw-body@~2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.2.0.tgz#994976cf6a5096a41162840492f0bdc5d6e7fb96"
+raw-body@2.4.3:
+  version "2.4.3"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.4.3.tgz#8f80305d11c2a0a545c2d9d89d7a0286fcead43c"
   dependencies:
-    bytes "2.4.0"
-    iconv-lite "0.4.15"
+    bytes "3.1.2"
+    http-errors "1.8.1"
+    iconv-lite "0.4.24"
     unpipe "1.0.0"
 
 readable-stream@^2.0.5:
@@ -557,44 +592,48 @@ readable-stream@^2.0.5:
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-safe-buffer@^5.0.1:
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
+safe-buffer@5.2.1, safe-buffer@^5.0.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+
+"safer-buffer@>= 2.1.2 < 3":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
 
 samsam@1.1.2, samsam@~1.1:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/samsam/-/samsam-1.1.2.tgz#bec11fdc83a9fda063401210e40176c3024d1567"
 
-send@0.14.2:
-  version "0.14.2"
-  resolved "https://registry.yarnpkg.com/send/-/send-0.14.2.tgz#39b0438b3f510be5dc6f667a11f71689368cdeef"
+send@0.17.2:
+  version "0.17.2"
+  resolved "https://registry.yarnpkg.com/send/-/send-0.17.2.tgz#926622f76601c41808012c8bf1688fe3906f7820"
   dependencies:
-    debug "~2.2.0"
-    depd "~1.1.0"
+    debug "2.6.9"
+    depd "~1.1.2"
     destroy "~1.0.4"
-    encodeurl "~1.0.1"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    etag "~1.7.0"
-    fresh "0.3.0"
-    http-errors "~1.5.1"
-    mime "1.3.4"
-    ms "0.7.2"
+    etag "~1.8.1"
+    fresh "0.5.2"
+    http-errors "1.8.1"
+    mime "1.6.0"
+    ms "2.1.3"
     on-finished "~2.3.0"
-    range-parser "~1.2.0"
-    statuses "~1.3.1"
+    range-parser "~1.2.1"
+    statuses "~1.5.0"
 
-serve-static@~1.11.2:
-  version "1.11.2"
-  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.11.2.tgz#2cf9889bd4435a320cc36895c9aa57bd662e6ac7"
+serve-static@1.14.2:
+  version "1.14.2"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.14.2.tgz#722d6294b1d62626d41b43a013ece4598d292bfa"
   dependencies:
-    encodeurl "~1.0.1"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    parseurl "~1.3.1"
-    send "0.14.2"
+    parseurl "~1.3.3"
+    send "0.17.2"
 
-setprototypeof@1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.2.tgz#81a552141ec104b88e89ce383103ad5c66564d08"
+setprototypeof@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
 
 sinon@^1.17.7:
   version "1.17.7"
@@ -605,9 +644,9 @@ sinon@^1.17.7:
     samsam "1.1.2"
     util ">=0.10.3 <1"
 
-"statuses@>= 1.3.1 < 2", statuses@~1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
+"statuses@>= 1.5.0 < 2", statuses@~1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
 
 string_decoder@~0.10.x:
   version "0.10.31"
@@ -641,6 +680,10 @@ supports-color@3.1.2:
   dependencies:
     has-flag "^1.0.0"
 
+toidentifier@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.1.tgz#3be34321a88a820ed1bd80dfaa33e479fbb8dd35"
+
 topo@1.x.x:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/topo/-/topo-1.1.0.tgz#e9d751615d1bb87dc865db182fa1ca0a5ef536d5"
@@ -655,12 +698,12 @@ type-detect@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-1.0.0.tgz#762217cc06db258ec48908a1298e8b95121e8ea2"
 
-type-is@~1.6.14:
-  version "1.6.14"
-  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.14.tgz#e219639c17ded1ca0789092dd54a03826b817cb2"
+type-is@~1.6.18:
+  version "1.6.18"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
   dependencies:
     media-typer "0.3.0"
-    mime-types "~2.1.13"
+    mime-types "~2.1.24"
 
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
@@ -676,13 +719,13 @@ util-deprecate@~1.0.1:
   dependencies:
     inherits "2.0.1"
 
-utils-merge@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.0.tgz#0294fb922bb9375153541c4f7096231f287c8af8"
+utils-merge@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
 
-vary@~1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.0.tgz#e1e5affbbd16ae768dd2674394b9ad3022653140"
+vary@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
 
 wrappy@1:
   version "1.0.2"