diff --git a/package.json b/package.json
index 1be69ae..7254809 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "start": "node server.js"
   },
   "dependencies": {
-    "express": "^4.16.3"
+    "express": "^4.16.4"
   },
   "engines": {
     "node": "8.x"
diff --git a/shrinkwrap.yaml b/shrinkwrap.yaml
index 8118cb1..5eb8ca5 100644
--- a/shrinkwrap.yaml
+++ b/shrinkwrap.yaml
@@ -1,9 +1,9 @@
 dependencies:
-  express: 4.16.3
+  express: 4.16.4
 packages:
   /accepts/1.3.5:
     dependencies:
-      mime-types: 2.1.18
+      mime-types: 2.1.21
       negotiator: 0.6.1
     dev: false
     engines:
@@ -14,23 +14,23 @@ packages:
     dev: false
     resolution:
       integrity: sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=
-  /body-parser/1.18.2:
+  /body-parser/1.18.3:
     dependencies:
       bytes: 3.0.0
       content-type: 1.0.4
       debug: 2.6.9
       depd: 1.1.2
-      http-errors: 1.6.2
-      iconv-lite: 0.4.19
+      http-errors: 1.6.3
+      iconv-lite: 0.4.23
       on-finished: 2.3.0
-      qs: 6.5.1
-      raw-body: 2.3.2
+      qs: 6.5.2
+      raw-body: 2.3.3
       type-is: 1.6.16
     dev: false
     engines:
       node: '>= 0.8'
     resolution:
-      integrity: sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=
+      integrity: sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=
   /bytes/3.0.0:
     dev: false
     engines:
@@ -65,12 +65,6 @@ packages:
     dev: false
     resolution:
       integrity: sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
-  /depd/1.1.1:
-    dev: false
-    engines:
-      node: '>= 0.6'
-    resolution:
-      integrity: sha1-V4O04cRZ8G+lyif5kfPQbnoxA1k=
   /depd/1.1.2:
     dev: false
     engines:
@@ -101,11 +95,11 @@ packages:
       node: '>= 0.6'
     resolution:
       integrity: sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
-  /express/4.16.3:
+  /express/4.16.4:
     dependencies:
       accepts: 1.3.5
       array-flatten: 1.1.1
-      body-parser: 1.18.2
+      body-parser: 1.18.3
       content-disposition: 0.5.2
       content-type: 1.0.4
       cookie: 0.3.1
@@ -122,10 +116,10 @@ packages:
       on-finished: 2.3.0
       parseurl: 1.3.2
       path-to-regexp: 0.1.7
-      proxy-addr: 2.0.3
-      qs: 6.5.1
+      proxy-addr: 2.0.4
+      qs: 6.5.2
       range-parser: 1.2.0
-      safe-buffer: 5.1.1
+      safe-buffer: 5.1.2
       send: 0.16.2
       serve-static: 1.13.2
       setprototypeof: 1.1.0
@@ -137,7 +131,7 @@ packages:
     engines:
       node: '>= 0.10.0'
     resolution:
-      integrity: sha1-avilAjUNsyRuzEvs9rWjTSL37VM=
+      integrity: sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==
   /finalhandler/1.1.1:
     dependencies:
       debug: 2.6.9
@@ -164,33 +158,35 @@ packages:
       node: '>= 0.6'
     resolution:
       integrity: sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=
-  /http-errors/1.6.2:
+  /http-errors/1.6.3:
     dependencies:
-      depd: 1.1.1
+      depd: 1.1.2
       inherits: 2.0.3
-      setprototypeof: 1.0.3
-      statuses: 1.4.0
+      setprototypeof: 1.1.0
+      statuses: 1.5.0
     dev: false
     engines:
       node: '>= 0.6'
     resolution:
-      integrity: sha1-CgAsyFcHGSp+eUbO7cERVfYOxzY=
-  /iconv-lite/0.4.19:
+      integrity: sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=
+  /iconv-lite/0.4.23:
+    dependencies:
+      safer-buffer: 2.1.2
     dev: false
     engines:
       node: '>=0.10.0'
     resolution:
-      integrity: sha512-oTZqweIP51xaGPI4uPa56/Pri/480R+mo7SeU+YETByQNhDG55ycFyNLIgta9vXhILrxXDmF7ZGhqZIcuN0gJQ==
+      integrity: sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==
   /inherits/2.0.3:
     dev: false
     resolution:
       integrity: sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
-  /ipaddr.js/1.6.0:
+  /ipaddr.js/1.8.0:
     dev: false
     engines:
       node: '>= 0.10'
     resolution:
-      integrity: sha1-4/o1e3c9phnybpXwSdBVxyeW+Gs=
+      integrity: sha1-6qM9bd16zo9/b+DJygRA5wZzix4=
   /media-typer/0.3.0:
     dev: false
     engines:
@@ -207,20 +203,20 @@ packages:
       node: '>= 0.6'
     resolution:
       integrity: sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4=
-  /mime-db/1.33.0:
+  /mime-db/1.37.0:
     dev: false
     engines:
       node: '>= 0.6'
     resolution:
-      integrity: sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ==
-  /mime-types/2.1.18:
+      integrity: sha512-R3C4db6bgQhlIhPU48fUtdVmKnflq+hRdad7IyKhtFj06VPNVdk2RhiYL3UjQIlso8L+YxAtFkobT0VK+S/ybg==
+  /mime-types/2.1.21:
     dependencies:
-      mime-db: 1.33.0
+      mime-db: 1.37.0
     dev: false
     engines:
       node: '>= 0.6'
     resolution:
-      integrity: sha512-lc/aahn+t4/SWV/qcmumYjymLsWfN3ELhpmVuUFjgsORruuZPVSwAQryq+HHGvO/SI2KVX26bx+En+zhM8g8hQ==
+      integrity: sha512-3iL6DbwpyLzjR3xHSFNFeb9Nz/M8WDkX33t1GFQnFOllWk8pOrh/LSrB5OXlnlW5P9LH73X6loW/eogc+F5lJg==
   /mime/1.4.1:
     dev: false
     hasBin: true
@@ -254,42 +250,46 @@ packages:
     dev: false
     resolution:
       integrity: sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=
-  /proxy-addr/2.0.3:
+  /proxy-addr/2.0.4:
     dependencies:
       forwarded: 0.1.2
-      ipaddr.js: 1.6.0
+      ipaddr.js: 1.8.0
     dev: false
     engines:
       node: '>= 0.10'
     resolution:
-      integrity: sha512-jQTChiCJteusULxjBp8+jftSQE5Obdl3k4cnmLA6WXtK6XFuWRnvVL7aCiBqaLPM8c4ph0S4tKna8XvmIwEnXQ==
-  /qs/6.5.1:
+      integrity: sha512-5erio2h9jp5CHGwcybmxmVqHmnCBZeewlfJ0pex+UW7Qny7OOZXTtH56TGNyBizkgiOwhJtMKrVzDTeKcySZwA==
+  /qs/6.5.2:
     dev: false
     engines:
       node: '>=0.6'
     resolution:
-      integrity: sha512-eRzhrN1WSINYCDCbrz796z37LOe3m5tmW7RQf6oBntukAG1nmovJvhnwHHRMAfeoItc1m2Hk02WER2aQ/iqs+A==
+      integrity: sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==
   /range-parser/1.2.0:
     dev: false
     engines:
       node: '>= 0.6'
     resolution:
       integrity: sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4=
-  /raw-body/2.3.2:
+  /raw-body/2.3.3:
     dependencies:
       bytes: 3.0.0
-      http-errors: 1.6.2
-      iconv-lite: 0.4.19
+      http-errors: 1.6.3
+      iconv-lite: 0.4.23
       unpipe: 1.0.0
     dev: false
     engines:
       node: '>= 0.8'
     resolution:
-      integrity: sha1-vNYMd9Prk83gBQKVw/N5OJvIj4k=
-  /safe-buffer/5.1.1:
+      integrity: sha512-9esiElv1BrZoI3rCDuOuKCBRbuApGGaDPQfjSflGxdy4oyzqghxu6klEkkVIvBje+FF0BX9coEv8KqW6X/7njw==
+  /safe-buffer/5.1.2:
     dev: false
     resolution:
-      integrity: sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==
+      integrity: sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+  /safer-buffer/2.1.2:
+    dev: false
+    resolution:
+      integrity: sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
   /send/0.16.2:
     dependencies:
       debug: 2.6.9
@@ -299,7 +299,7 @@ packages:
       escape-html: 1.0.3
       etag: 1.8.1
       fresh: 0.5.2
-      http-errors: 1.6.2
+      http-errors: 1.6.3
       mime: 1.4.1
       ms: 2.0.0
       on-finished: 2.3.0
@@ -321,10 +321,6 @@ packages:
       node: '>= 0.8.0'
     resolution:
       integrity: sha512-p/tdJrO4U387R9oMjb1oj7qSMaMfmOyd4j9hOFoxZe2baQszgHcSWjuya/CiT5kgZZKRudHNOA0pYXOl8rQ5nw==
-  /setprototypeof/1.0.3:
-    dev: false
-    resolution:
-      integrity: sha1-ZlZ+NwQ+608E2RvWWMDL77VbjgQ=
   /setprototypeof/1.1.0:
     dev: false
     resolution:
@@ -335,10 +331,16 @@ packages:
       node: '>= 0.6'
     resolution:
       integrity: sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew==
+  /statuses/1.5.0:
+    dev: false
+    engines:
+      node: '>= 0.6'
+    resolution:
+      integrity: sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
   /type-is/1.6.16:
     dependencies:
       media-typer: 0.3.0
-      mime-types: 2.1.18
+      mime-types: 2.1.21
     dev: false
     engines:
       node: '>= 0.6'
@@ -366,4 +368,4 @@ registry: 'https://registry.npmjs.org/'
 shrinkwrapMinorVersion: 9
 shrinkwrapVersion: 3
 specifiers:
-  express: ^4.16.3
+  express: ^4.16.4