diff --git a/package-lock.json b/package-lock.json
index 0e17613..6dbd7d7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -679,8 +679,8 @@
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-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
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@@ -1699,9 +1699,19 @@
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-      "resolved": "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz",
-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
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+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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+        }
+      }
     },
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@@ -1962,8 +1972,8 @@
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-      "resolved": "https://registry.yarnpkg.com/destroy/-/destroy-1.0.4.tgz",
-      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
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@@ -2080,8 +2090,8 @@
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-      "resolved": "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz",
-      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
+      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
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@@ -2106,8 +2116,8 @@
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-      "resolved": "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz",
-      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
+      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
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@@ -2334,107 +2344,155 @@
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-      "resolved": "https://registry.yarnpkg.com/express/-/express-4.16.3.tgz",
-      "integrity": "sha1-avilAjUNsyRuzEvs9rWjTSL37VM=",
+      "version": "4.17.3",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.17.3.tgz",
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-        "content-disposition": "0.5.2",
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         "escape-html": "~1.0.3",
         "etag": "~1.8.1",
-        "finalhandler": "1.1.1",
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         "merge-descriptors": "1.0.1",
         "methods": "~1.1.2",
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-          "integrity": "sha1-iTMSr2myEj3vcfV4iQAWce6yyFM="
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+          "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="
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+          "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+          "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
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+            "mime-types": "~2.1.24"
+          }
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@@ -2570,17 +2628,24 @@
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-      "resolved": "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.1.tgz",
-      "integrity": "sha1-7r9O2EAHnIP0JJA4ydcDAIMBsQU=",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
+      "integrity": "sha512-aAWcW57uxVNrQZqFXjITpW3sIUQmHGG3qSb9mUah9MgMC4NeWhNOlNjXEYq3HjRAvL6arUviZGGJsBg6z0zsWA==",
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         "escape-html": "~1.0.3",
         "on-finished": "~2.3.0",
-        "parseurl": "~1.3.2",
-        "statuses": "~1.4.0",
+        "parseurl": "~1.3.3",
+        "statuses": "~1.5.0",
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+      },
+      "dependencies": {
+        "parseurl": {
+          "version": "1.3.3",
+          "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
+          "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
+        }
       }
     },
     "find-remove": {
@@ -2664,9 +2729,9 @@
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-      "version": "0.1.2",
-      "resolved": "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz",
-      "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
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@@ -3605,9 +3670,9 @@
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-      "integrity": "sha1-4/o1e3c9phnybpXwSdBVxyeW+Gs="
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
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@@ -4368,13 +4433,13 @@
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-      "integrity": "sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E="
+      "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz",
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-      "integrity": "sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4="
+      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
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@@ -4430,9 +4495,9 @@
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-      "resolved": "https://registry.yarnpkg.com/mime/-/mime-1.4.1.tgz",
-      "integrity": "sha1-Eh+evEnjdm8xGnbh+hyAA8SwOqY="
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
+      "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg=="
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@@ -8011,8 +8076,8 @@
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-      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
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@@ -8157,12 +8222,12 @@
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-      "resolved": "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.3.tgz",
-      "integrity": "sha1-NV8mJQWmIWRrMTCnKOtkfiIFU0E=",
+      "version": "2.0.7",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
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       "requires": {
-        "forwarded": "~0.1.2",
-        "ipaddr.js": "1.6.0"
+        "forwarded": "0.2.0",
+        "ipaddr.js": "1.9.1"
       }
     },
     "ps-tree": {
@@ -8193,9 +8258,9 @@
       "dev": true
     },
     "qs": {
-      "version": "6.5.1",
-      "resolved": "https://registry.yarnpkg.com/qs/-/qs-6.5.1.tgz",
-      "integrity": "sha1-NJzfbu+J7EXBLX1es/wMhwNDptg="
+      "version": "6.9.7",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.7.tgz",
+      "integrity": "sha512-IhMFgUmuNpyRfxA90umL7ByLlgRXu6tIfKPpF5TmcfRLlLCckfP/g3IQmju6jjpu+Hh8rA+2p6A27ZSPOOHdKw=="
     },
     "quick-lru": {
       "version": "1.1.0",
@@ -8234,9 +8299,9 @@
       }
     },
     "range-parser": {
-      "version": "1.2.0",
-      "resolved": "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.0.tgz",
-      "integrity": "sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4="
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
+      "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg=="
     },
     "raw-body": {
       "version": "2.3.3",
@@ -8608,9 +8673,9 @@
       }
     },
     "send": {
-      "version": "0.16.2",
-      "resolved": "https://registry.yarnpkg.com/send/-/send-0.16.2.tgz",
-      "integrity": "sha1-bsyh4PjBVtFBWXVZhI32RzCmu8E=",
+      "version": "0.17.2",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.2.tgz",
+      "integrity": "sha512-UJYB6wFSJE3G00nEivR5rgWp8c2xXvJ3OPWPhmuteU0IKj8nKbG3DrjiOmLwpnHGYWAVwA69zmTm++YG0Hmwww==",
       "requires": {
         "debug": "2.6.9",
         "depd": "~1.1.2",
@@ -8619,12 +8684,41 @@
         "escape-html": "~1.0.3",
         "etag": "~1.8.1",
         "fresh": "0.5.2",
-        "http-errors": "~1.6.2",
-        "mime": "1.4.1",
-        "ms": "2.0.0",
+        "http-errors": "1.8.1",
+        "mime": "1.6.0",
+        "ms": "2.1.3",
         "on-finished": "~2.3.0",
-        "range-parser": "~1.2.0",
-        "statuses": "~1.4.0"
+        "range-parser": "~1.2.1",
+        "statuses": "~1.5.0"
+      },
+      "dependencies": {
+        "http-errors": {
+          "version": "1.8.1",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.8.1.tgz",
+          "integrity": "sha512-Kpk9Sm7NmI+RHhnj6OIWDI1d6fIoFAtFt9RLaTMRlg/8w49juAStsrBgp0Dp4OdxdVbRIeKhtCUvoi/RuAhO4g==",
+          "requires": {
+            "depd": "~1.1.2",
+            "inherits": "2.0.4",
+            "setprototypeof": "1.2.0",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.1"
+          }
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "ms": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
+        },
+        "setprototypeof": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+          "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="
+        }
       }
     },
     "sentence-case": {
@@ -8661,14 +8755,21 @@
       }
     },
     "serve-static": {
-      "version": "1.13.2",
-      "resolved": "https://registry.yarnpkg.com/serve-static/-/serve-static-1.13.2.tgz",
-      "integrity": "sha1-CV6Ecv1bRiN9tQzkhqQ/S4bGzsE=",
+      "version": "1.14.2",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.2.tgz",
+      "integrity": "sha512-+TMNA9AFxUEGuC0z2mevogSnn9MXKb4fa7ngeRMJaaGv8vTwnIEkKi+QGvPt33HSnf8pRS+WGM0EbMtCJLKMBQ==",
       "requires": {
         "encodeurl": "~1.0.2",
         "escape-html": "~1.0.3",
-        "parseurl": "~1.3.2",
-        "send": "0.16.2"
+        "parseurl": "~1.3.3",
+        "send": "0.17.2"
+      },
+      "dependencies": {
+        "parseurl": {
+          "version": "1.3.3",
+          "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
+          "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
+        }
       }
     },
     "set-immediate-shim": {
@@ -8935,9 +9036,9 @@
       }
     },
     "statuses": {
-      "version": "1.4.0",
-      "resolved": "https://registry.yarnpkg.com/statuses/-/statuses-1.4.0.tgz",
-      "integrity": "sha1-u3PURtonlhBu/MG2AaJT1sRr0Ic="
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
+      "integrity": "sha512-OpZ3zP+jT1PI7I8nemJX4AKmAX070ZkYPVWV/AaKTJl+tXCTGyVdC1a4SL8RUQYEwk/f34ZX8UTykN68FwrqAA=="
     },
     "stream-combiner": {
       "version": "0.0.4",
@@ -9220,6 +9321,11 @@
         "repeat-string": "^1.6.1"
       }
     },
+    "toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
+    },
     "touch": {
       "version": "3.1.0",
       "resolved": "https://registry.yarnpkg.com/touch/-/touch-3.1.0.tgz",
diff --git a/package.json b/package.json
index 4d65158..0939fef 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "cookie-parser": "~1.3.5",
     "debug": "~2.6.9",
     "eslint": "^4.18.2",
-    "express": "~4.16.0",
+    "express": "~4.17.3",
     "express-session": "^1.13.0",
     "find-remove": "^0.2.10",
     "fs-plus": "^2.8.1",