diff --git a/package.json b/package.json
index 3511020..fd7602f 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "cron": "1.2.1",
     "debug": "^2.4.5",
     "dotenv": "^4.0.0",
-    "express": "4.14.0",
+    "express": "4.15.0",
     "express-jwt": "5.1.0",
     "express-validation": "1.0.1",
     "express-winston": "2.1.2",
diff --git a/yarn.lock b/yarn.lock
index a0a350f..87d5b6e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1451,9 +1451,10 @@ contains-path@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/contains-path/-/contains-path-0.1.0.tgz#fe8cf184ff6670b6baef01a9d4861a5cbec4120a"
 
-content-disposition@0.5.1:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.1.tgz#87476c6a67c8daa87e32e87616df883ba7fb071b"
+content-disposition@0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
+  integrity sha512-kRGRZw3bLlFISDBgwTSA1TMBFN6J6GWDeubmDE3AF+3+yXL8hTWv8r5rkLbqYXY4RjPk/EzHnClI3zQf1cFmHA==
 
 content-security-policy-builder@1.1.0:
   version "1.1.0"
@@ -1636,6 +1637,13 @@ debug@2.2.0, debug@~2.2.0:
   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"
+  integrity sha512-BmFi/QgceF1MztznXEqbZXATlMwzrsfWR9Iahbp4j7vTK+Sel84Mt3SZ/btENs22PSm0bw6NOoZOd2fbOczPRQ==
+  dependencies:
+    ms "0.7.2"
+
 debug@2.6.9, debug@2.X, debug@^2.1.1, debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.4.5, debug@^2.6.8, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
@@ -1725,7 +1733,7 @@ delegates@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
 
-depd@~1.1.0:
+depd@~1.1.0, depd@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
 
@@ -2045,9 +2053,10 @@ esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
 
-etag@~1.7.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/etag/-/etag-1.7.0.tgz#03d30b5f67dd6e632d2945d30d6652731a34d5d8"
+etag@~1.8.0:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
+  integrity sha512-aIL5Fx7mawVa300al2BnEE4iNvo1qETxLrPI/o05L7z6go7fCw1J6EQmbK4FmJ2AS7kgVF/KEZWufBfdClMcPg==
 
 event-emitter@~0.3.5:
   version "0.3.5"
@@ -2146,34 +2155,37 @@ express-winston@2.1.2:
     chalk "~0.4.0"
     lodash "~4.11.1"
 
-express@4.14.0:
-  version "4.14.0"
-  resolved "https://registry.yarnpkg.com/express/-/express-4.14.0.tgz#c1ee3f42cdc891fb3dc650a8922d51ec847d0d66"
+express@4.15.0:
+  version "4.15.0"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.15.0.tgz#8fb125829f70a04a59e1c40ceb8dea19cf5c879c"
+  integrity sha512-ZfKQUIOr+nPpy0nbfho9jK6dmp3S0Z7VRGuxJFYgPkJSU+n41ujsFl2UFV79y6JSFhkDJXibgqpWscNmu9hZeA==
   dependencies:
     accepts "~1.3.3"
     array-flatten "1.1.1"
-    content-disposition "0.5.1"
+    content-disposition "0.5.2"
     content-type "~1.0.2"
     cookie "0.3.1"
     cookie-signature "1.0.6"
-    debug "~2.2.0"
+    debug "2.6.1"
     depd "~1.1.0"
     encodeurl "~1.0.1"
     escape-html "~1.0.3"
-    etag "~1.7.0"
-    finalhandler "0.5.0"
-    fresh "0.3.0"
+    etag "~1.8.0"
+    finalhandler "~1.0.0"
+    fresh "0.5.0"
     merge-descriptors "1.0.1"
     methods "~1.1.2"
     on-finished "~2.3.0"
     parseurl "~1.3.1"
     path-to-regexp "0.1.7"
-    proxy-addr "~1.1.2"
-    qs "6.2.0"
+    proxy-addr "~1.1.3"
+    qs "6.3.1"
     range-parser "~1.2.0"
-    send "0.14.1"
-    serve-static "~1.11.1"
-    type-is "~1.6.13"
+    send "0.15.0"
+    serve-static "1.12.0"
+    setprototypeof "1.0.3"
+    statuses "~1.3.1"
+    type-is "~1.6.14"
     utils-merge "1.0.0"
     vary "~1.1.0"
 
@@ -2335,14 +2347,17 @@ finalhandler@0.4.1:
     on-finished "~2.3.0"
     unpipe "~1.0.0"
 
-finalhandler@0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-0.5.0.tgz#e9508abece9b6dba871a6942a1d7911b91911ac7"
+finalhandler@~1.0.0:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.0.6.tgz#007aea33d1a4d3e42017f624848ad58d212f814f"
+  integrity sha512-immlyyYCPWG2tajlYBhZ6cjLAv1QAclU8tKS0d27ZtPqm/+iddy16GT3xLExg+V4lIETLpPwaYQAlZHNE//dPA==
   dependencies:
-    debug "~2.2.0"
+    debug "2.6.9"
+    encodeurl "~1.0.1"
     escape-html "~1.0.3"
     on-finished "~2.3.0"
-    statuses "~1.3.0"
+    parseurl "~1.3.2"
+    statuses "~1.3.1"
     unpipe "~1.0.0"
 
 find-index@^0.1.1:
@@ -2510,9 +2525,10 @@ frameguard@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/frameguard/-/frameguard-3.0.0.tgz#7bcad469ee7b96e91d12ceb3959c78235a9272e9"
 
-fresh@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.3.0.tgz#651f838e22424e7566de161d8358caa199f83d4f"
+fresh@0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.0.tgz#f474ca5e6a9246d6fd8e0953cfa9b9c805afa78e"
+  integrity sha512-FveevZlqNSIBombLEB9L3WyWg74r6d0sk+unzqKmt33b5egY0YXDFWIQ/t2Fzr9mgBLL0BlL0/rdg8Oq1C0SVw==
 
 from@~0:
   version "0.1.7"
@@ -3137,7 +3153,7 @@ hsts@2.0.0:
   dependencies:
     core-util-is "1.0.2"
 
-http-errors@~1.5.0, http-errors@~1.5.1:
+http-errors@~1.5.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.5.1.tgz#788c0d2c1de2c81b9e6e8c01843b6b97eb920750"
   dependencies:
@@ -3145,6 +3161,16 @@ http-errors@~1.5.0, http-errors@~1.5.1:
     setprototypeof "1.0.2"
     statuses ">= 1.3.1 < 2"
 
+http-errors@~1.6.1:
+  version "1.6.3"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.6.3.tgz#8b55680bb4be283a0b5bf4ea2e38580be1d9320d"
+  integrity sha512-lks+lVC8dgGyh97jxvxeYTWQFvh4uw4yC12gVl63Cg30sjPX4wuGcdkICVXDAESr6OJGjqGA8Iz5mkeN6zlD7A==
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.3"
+    setprototypeof "1.1.0"
+    statuses ">= 1.4.0 < 2"
+
 http-parser-js@>=0.4.0:
   version "0.4.13"
   resolved "https://registry.yarnpkg.com/http-parser-js/-/http-parser-js-0.4.13.tgz#3bd6d6fde6e3172c9334c3b33b6c193d80fe1137"
@@ -4247,6 +4273,11 @@ mime-db@1.40.0:
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.40.0.tgz#a65057e998db090f732a68f6c276d387d4126c32"
   integrity sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA==
 
+mime-db@1.52.0:
+  version "1.52.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.52.0.tgz#bbabcdc02859f4987301c856e3387ce5ec43bf70"
+  integrity sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==
+
 "mime-db@>= 1.33.0 < 2", mime-db@~1.33.0:
   version "1.33.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.33.0.tgz#a3492050a5cb9b63450541e39d9788d2272783db"
@@ -4264,6 +4295,13 @@ mime-types@~2.1.19:
   dependencies:
     mime-db "1.40.0"
 
+mime-types@~2.1.24:
+  version "2.1.35"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.35.tgz#381a871b62a734450660ae3deee44813f70d959a"
+  integrity sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==
+  dependencies:
+    mime-db "1.52.0"
+
 mime@1.3.4, mime@^1.3.4:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
@@ -4934,9 +4972,10 @@ progress@^1.1.8:
   version "1.1.8"
   resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"
 
-proxy-addr@~1.1.2:
+proxy-addr@~1.1.3:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-1.1.5.tgz#71c0ee3b102de3f202f3b64f608d173fcba1a918"
+  integrity sha512-av1MQ5vwTiMICwU75KSf/vJ6a+AXP0MtP+aYBqm2RFlire7BP6sWlfOLc8+6wIQrywycqSpJWm5zNkYFkRARWA==
   dependencies:
     forwarded "~0.1.0"
     ipaddr.js "1.4.0"
@@ -4990,6 +5029,11 @@ qs@6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.0.tgz#3b7848c03c2dece69a9522b0fae8c4126d745f3b"
 
+qs@6.3.1:
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.1.tgz#918c0b3bcd36679772baf135b1acb4c1651ed79d"
+  integrity sha512-A4Hf32qAqlFeW0jPKgO8CiwK8KMBl9dv0I45752gbWG938IPI/pY7yK6hbBL5L0Y3nh5XeRWJ0MrGlK0VOFT7g==
+
 qs@^6.1.0, qs@~6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
@@ -5415,36 +5459,19 @@ semver@^5.6.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.0.tgz#790a7cf6fea5459bac96110b29b60412dc8ff96b"
   integrity sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==
 
-send@0.14.1:
-  version "0.14.1"
-  resolved "https://registry.yarnpkg.com/send/-/send-0.14.1.tgz#a954984325392f51532a7760760e459598c89f7a"
-  dependencies:
-    debug "~2.2.0"
-    depd "~1.1.0"
-    destroy "~1.0.4"
-    encodeurl "~1.0.1"
-    escape-html "~1.0.3"
-    etag "~1.7.0"
-    fresh "0.3.0"
-    http-errors "~1.5.0"
-    mime "1.3.4"
-    ms "0.7.1"
-    on-finished "~2.3.0"
-    range-parser "~1.2.0"
-    statuses "~1.3.0"
-
-send@0.14.2:
-  version "0.14.2"
-  resolved "https://registry.yarnpkg.com/send/-/send-0.14.2.tgz#39b0438b3f510be5dc6f667a11f71689368cdeef"
+send@0.15.0:
+  version "0.15.0"
+  resolved "https://registry.yarnpkg.com/send/-/send-0.15.0.tgz#f0185d6466fa76424b866f3d533e2d19dd0aaa39"
+  integrity sha512-ZhqaTSQTbQmRvPLArT534A3SJVbnZknM9XcPOJoMulg9A4hXStwKaTaR7dve8eFOA9DmzmZdJpc1nVEkeKyxCw==
   dependencies:
-    debug "~2.2.0"
+    debug "2.6.1"
     depd "~1.1.0"
     destroy "~1.0.4"
     encodeurl "~1.0.1"
     escape-html "~1.0.3"
-    etag "~1.7.0"
-    fresh "0.3.0"
-    http-errors "~1.5.1"
+    etag "~1.8.0"
+    fresh "0.5.0"
+    http-errors "~1.6.1"
     mime "1.3.4"
     ms "0.7.2"
     on-finished "~2.3.0"
@@ -5455,14 +5482,15 @@ sequencify@~0.0.7:
   version "0.0.7"
   resolved "https://registry.yarnpkg.com/sequencify/-/sequencify-0.0.7.tgz#90cff19d02e07027fd767f5ead3e7b95d1e7380c"
 
-serve-static@~1.11.1:
-  version "1.11.2"
-  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.11.2.tgz#2cf9889bd4435a320cc36895c9aa57bd662e6ac7"
+serve-static@1.12.0:
+  version "1.12.0"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.12.0.tgz#150eb8aa262c2dd1924e960373145446c069dad6"
+  integrity sha512-wUl7rlZeKrwCxSnEJ0q18HHg9DpV3VCDPPxrtUPVBbGhc/dyMBq5qVdXiY35VqoSlml/TVrGQ3p4QARnODCQGg==
   dependencies:
     encodeurl "~1.0.1"
     escape-html "~1.0.3"
     parseurl "~1.3.1"
-    send "0.14.2"
+    send "0.15.0"
 
 set-blocking@~2.0.0:
   version "2.0.0"
@@ -5494,6 +5522,16 @@ setprototypeof@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.2.tgz#81a552141ec104b88e89ce383103ad5c66564d08"
 
+setprototypeof@1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.3.tgz#66567e37043eeb4f04d91bd658c0cbefb55b8e04"
+  integrity sha512-9jphSf3UbIgpOX/RKvX02iw/rN2TKdusnsPpGfO/rkcsrd+IRqgHZb4VGnmL0Cynps8Nj2hN45wsi30BzrHDIw==
+
+setprototypeof@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.0.tgz#d0bd85536887b6fe7c0d818cb962d9d91c54e656"
+  integrity sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ==
+
 shebang-command@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
@@ -5660,11 +5698,11 @@ static-extend@^0.1.1:
     define-property "^0.2.5"
     object-copy "^0.1.0"
 
-"statuses@>= 1.3.1 < 2":
+"statuses@>= 1.3.1 < 2", "statuses@>= 1.4.0 < 2":
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
 
-statuses@~1.3.0, statuses@~1.3.1:
+statuses@~1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
 
@@ -5996,6 +6034,14 @@ type-is@~1.6.13:
     media-typer "0.3.0"
     mime-types "~2.1.18"
 
+type-is@~1.6.14:
+  version "1.6.18"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
+  integrity sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==
+  dependencies:
+    media-typer "0.3.0"
+    mime-types "~2.1.24"
+
 typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"