diff --git a/package.json b/package.json
index 17709db..e626fef 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "validator": "^8.0.0",
     "pg": "^7.8.0",
     "pg-hstore": "^2.3.2",
-    "sequelize": "^4.42.0"
+    "sequelize": "^5.15.1"
   },
   "devDependencies": {
     "babel-eslint": "^7.2.3",
diff --git a/yarn.lock b/yarn.lock
index 6b3d67c..ca706dd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,11 +2,6 @@
 # yarn lockfile v1
 
 
-"@types/geojson@^1.0.0":
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/@types/geojson/-/geojson-1.0.6.tgz#3e02972728c69248c2af08d60a48cbb8680fffdf"
-  integrity sha512-Xqg/lIZMrUd0VRmSRbCAewtwGZiAk3mEUDvV4op1tGl+LvyPcb/MIOSxTl9z+9+J+R4/vpjiCAT4xeKzH9ji1w==
-
 "@types/node@*":
   version "10.12.18"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.18.tgz#1d3ca764718915584fcd9f6344621b7672665c67"
@@ -64,6 +59,11 @@ ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
 
+any-promise@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
+  integrity sha1-q8av7tzqUugJzcA3au0845Y10X8=
+
 anymatch@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-1.3.0.tgz#a3e52fa39168c825ff57b0248126ce5a8ff95507"
@@ -768,6 +768,42 @@ babel-preset-env@^1.5.2:
     invariant "^2.2.2"
     semver "^5.3.0"
 
+babel-preset-env@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.7.0.tgz#dea79fa4ebeb883cd35dab07e260c1c9c04df77a"
+  integrity sha512-9OR2afuKDneX2/q2EurSftUYM0xGu4O2D9adAhVfADDhrYDaxXV0rBbevVYoY9n6nyX1PmQW/0jtpJvUNr9CHg==
+  dependencies:
+    babel-plugin-check-es2015-constants "^6.22.0"
+    babel-plugin-syntax-trailing-function-commas "^6.22.0"
+    babel-plugin-transform-async-to-generator "^6.22.0"
+    babel-plugin-transform-es2015-arrow-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoping "^6.23.0"
+    babel-plugin-transform-es2015-classes "^6.23.0"
+    babel-plugin-transform-es2015-computed-properties "^6.22.0"
+    babel-plugin-transform-es2015-destructuring "^6.23.0"
+    babel-plugin-transform-es2015-duplicate-keys "^6.22.0"
+    babel-plugin-transform-es2015-for-of "^6.23.0"
+    babel-plugin-transform-es2015-function-name "^6.22.0"
+    babel-plugin-transform-es2015-literals "^6.22.0"
+    babel-plugin-transform-es2015-modules-amd "^6.22.0"
+    babel-plugin-transform-es2015-modules-commonjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-systemjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-umd "^6.23.0"
+    babel-plugin-transform-es2015-object-super "^6.22.0"
+    babel-plugin-transform-es2015-parameters "^6.23.0"
+    babel-plugin-transform-es2015-shorthand-properties "^6.22.0"
+    babel-plugin-transform-es2015-spread "^6.22.0"
+    babel-plugin-transform-es2015-sticky-regex "^6.22.0"
+    babel-plugin-transform-es2015-template-literals "^6.22.0"
+    babel-plugin-transform-es2015-typeof-symbol "^6.23.0"
+    babel-plugin-transform-es2015-unicode-regex "^6.22.0"
+    babel-plugin-transform-exponentiation-operator "^6.22.0"
+    babel-plugin-transform-regenerator "^6.22.0"
+    browserslist "^3.2.6"
+    invariant "^2.2.2"
+    semver "^5.3.0"
+
 babel-preset-es2015@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.24.1.tgz#d44050d6bc2c9feea702aaf38d727a0210538939"
@@ -932,7 +968,7 @@ block-stream@*:
   dependencies:
     inherits "~2.0.0"
 
-bluebird@^3.4.6, bluebird@^3.5.0:
+bluebird@^3.5.0:
   version "3.5.3"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.3.tgz#7d01c6f9616c9a51ab0f8c549a79dfe6ec33efa7"
   integrity sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw==
@@ -965,6 +1001,14 @@ browserslist@^2.1.2:
     caniuse-lite "^1.0.30000684"
     electron-to-chromium "^1.3.14"
 
+browserslist@^3.2.6:
+  version "3.2.8"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-3.2.8.tgz#b0005361d6471f0f5952797a76fc985f1f978fc6"
+  integrity sha512-WHVocJYavUwVgVViC0ORikPHQquXwVh939TaelZ4WDqpWgTX/FsGhl/+P4qBUAGcRvtOgDgC+xftNWWp2RUTAQ==
+  dependencies:
+    caniuse-lite "^1.0.30000844"
+    electron-to-chromium "^1.3.47"
+
 buffer-writer@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/buffer-writer/-/buffer-writer-2.0.0.tgz#ce7eb81a38f7829db09c873f2fbb792c0c98ec04"
@@ -992,6 +1036,11 @@ caniuse-lite@^1.0.30000684:
   version "1.0.30000697"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000697.tgz#125fb00604b63fbb188db96a667ce2922dcd6cdd"
 
+caniuse-lite@^1.0.30000844:
+  version "1.0.30001006"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001006.tgz#5b6e8288792cfa275f007b2819a00ccad7112655"
+  integrity sha512-MXnUVX27aGs/QINz+QG1sWSLDr3P1A3Hq5EUWoIt0T7K24DuvMxZEnh3Y5aHlJW6Bz2aApJdSewdYLd8zQnUuw==
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -1136,23 +1185,17 @@ debug@2.6.7:
   dependencies:
     ms "2.0.0"
 
-debug@2.6.9, debug@^2.6.9:
+debug@2.6.9, debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
   dependencies:
     ms "2.0.0"
 
-debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
-  version "2.6.8"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
-  dependencies:
-    ms "2.0.0"
-
-debug@^3.1.0:
-  version "3.2.6"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
-  integrity sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==
+debug@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
   dependencies:
     ms "^2.1.1"
 
@@ -1195,7 +1238,7 @@ depd@1.1.0, depd@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.0.tgz#e1bd82c6aab6ced965b97b88b17ed3e528ca18c3"
 
-depd@^1.1.0, depd@~1.1.2:
+depd@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
   integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
@@ -1256,6 +1299,11 @@ electron-to-chromium@^1.3.14:
   version "1.3.15"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.15.tgz#08397934891cbcfaebbd18b82a95b5a481138369"
 
+electron-to-chromium@^1.3.47:
+  version "1.3.301"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.301.tgz#a501a4542ceb78eeba55736fdaafb64a4c421a3a"
+  integrity sha512-MRUScWKAi/zh0B0vCOIWTXvFZDdCGtqFH9rmB0r8s6CR6zPgDFpc80JYj/kEB7dvoU5LpwGhIxF4BkeUWwKlqA==
+
 encodeurl@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.1.tgz#79e3d58655346909fe6f0f45a5de68103b294d20"
@@ -1649,11 +1697,6 @@ generate-object-property@^1.1.0:
   dependencies:
     is-property "^1.0.0"
 
-generic-pool@^3.4.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/generic-pool/-/generic-pool-3.5.0.tgz#acac4fd743a175ff20574f380910036464cb61f7"
-  integrity sha512-dEkxmX+egB2o4NR80c/q+xzLLzLX+k68/K8xv81XprD+Sk7ZtP14VugeCz+fUwv5FzpWq40pPtAkzPRqT8ka9w==
-
 getpass@^0.1.1:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz#5eff8e3e684d569ae4cb2b1282604e8ba62149fa"
@@ -2196,14 +2239,10 @@ lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
 
-lodash@^4.0.0, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.3.0:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
-
-lodash@^4.17.1:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
-  integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
+lodash@^4.0.0, lodash@^4.17.11, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.3.0:
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
 
 loose-envify@^1.0.0:
   version "1.3.1"
@@ -2287,14 +2326,14 @@ minimist@^1.2.0:
   dependencies:
     minimist "0.0.8"
 
-moment-timezone@^0.5.14:
-  version "0.5.23"
-  resolved "https://registry.yarnpkg.com/moment-timezone/-/moment-timezone-0.5.23.tgz#7cbb00db2c14c71b19303cb47b0fb0a6d8651463"
-  integrity sha512-WHFH85DkCfiNMDX5D3X7hpNH3/PUhjTGcD0U1SgfBGZxJ3qUmJh5FdvaFjcClxOvB3rzdfj4oRffbI38jEnC1w==
+moment-timezone@^0.5.21:
+  version "0.5.27"
+  resolved "https://registry.yarnpkg.com/moment-timezone/-/moment-timezone-0.5.27.tgz#73adec8139b6fe30452e78f210f27b1f346b8877"
+  integrity sha512-EIKQs7h5sAsjhPCqN6ggx6cEbs94GK050254TIJySD1bzoM5JTYDwAU1IoVOeTOL6Gm27kYJ51/uuvq1kIlrbw==
   dependencies:
     moment ">= 2.9.0"
 
-"moment@>= 2.9.0", moment@^2.20.0:
+"moment@>= 2.9.0", moment@^2.24.0:
   version "2.24.0"
   resolved "https://registry.yarnpkg.com/moment/-/moment-2.24.0.tgz#0d055d53f5052aa653c9f6eb68bb5d12bf5c2b5b"
   integrity sha512-bV7f+6l2QigeBBZSM/6yTNq4P2fNpSWj/0e7jQcy87A8e7o2nAfP/34/2ky5Vw4B9S446EtIhodAzkFCcR4dQg==
@@ -2921,13 +2960,12 @@ restore-cursor@^2.0.0:
     onetime "^2.0.0"
     signal-exit "^3.0.2"
 
-retry-as-promised@^2.3.2:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/retry-as-promised/-/retry-as-promised-2.3.2.tgz#cd974ee4fd9b5fe03cbf31871ee48221c07737b7"
-  integrity sha1-zZdO5P2bX+A8vzGHHuSCIcB3N7c=
+retry-as-promised@^3.1.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/retry-as-promised/-/retry-as-promised-3.2.0.tgz#769f63d536bec4783549db0777cb56dadd9d8543"
+  integrity sha512-CybGs60B7oYU/qSQ6kuaFmRd9sTZ6oXSc0toqePvV74Ac6/IFZSI1ReFQmtCN+uvW1Mtqdwpvt/LGOiCBAY2Mg==
   dependencies:
-    bluebird "^3.4.6"
-    debug "^2.6.9"
+    any-promise "^1.3.0"
 
 rimraf@2, rimraf@^2.2.8, rimraf@^2.5.1, rimraf@^2.6.1:
   version "2.6.1"
@@ -2975,10 +3013,10 @@ semver@4.3.2:
   resolved "https://registry.yarnpkg.com/semver/-/semver-4.3.2.tgz#c7a07158a80bedd052355b770d82d6640f803be7"
   integrity sha1-x6BxWKgL7dBSNVt3DYLWZA+AO+c=
 
-semver@^5.5.0:
-  version "5.6.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.6.0.tgz#7e74256fbaa49c75aa7c7a205cc22799cac80004"
-  integrity sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==
+semver@^6.1.1:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
 send@0.15.3:
   version "0.15.3"
@@ -2998,28 +3036,31 @@ send@0.15.3:
     range-parser "~1.2.0"
     statuses "~1.3.1"
 
-sequelize@^4.42.0:
-  version "4.42.0"
-  resolved "https://registry.yarnpkg.com/sequelize/-/sequelize-4.42.0.tgz#439467ba7bfe7d5afcc56d62b3e091860fbf18f3"
-  integrity sha512-qxAYnX4rcv7PbNtEidb56REpxNJCdbN0qyk1jb3+e6sE7OrmS0nYMU+MFVbNTJtZfSpOEEL1TX0TkMw+wzZBxg==
+sequelize-pool@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/sequelize-pool/-/sequelize-pool-2.3.0.tgz#64f1fe8744228172c474f530604b6133be64993d"
+  integrity sha512-Ibz08vnXvkZ8LJTiUOxRcj1Ckdn7qafNZ2t59jYHMX1VIebTAOYefWdRYFt6z6+hy52WGthAHAoLc9hvk3onqA==
+
+sequelize@^5.15.1:
+  version "5.15.1"
+  resolved "https://registry.yarnpkg.com/sequelize/-/sequelize-5.15.1.tgz#f130ded17e74395ae7f5e265277c99577e895afb"
+  integrity sha512-DCzzJYvJLMKnyf8G3at2A+yM9M2fSQmTmuOYIpCWM8Gjqx3XfgNTd1NkuyPWFoi1/d1AXQsN2VDPXkPczida8A==
   dependencies:
     bluebird "^3.5.0"
     cls-bluebird "^2.1.0"
-    debug "^3.1.0"
-    depd "^1.1.0"
+    debug "^4.1.1"
     dottie "^2.0.0"
-    generic-pool "^3.4.0"
     inflection "1.12.0"
-    lodash "^4.17.1"
-    moment "^2.20.0"
-    moment-timezone "^0.5.14"
-    retry-as-promised "^2.3.2"
-    semver "^5.5.0"
-    terraformer-wkt-parser "^1.1.2"
+    lodash "^4.17.11"
+    moment "^2.24.0"
+    moment-timezone "^0.5.21"
+    retry-as-promised "^3.1.0"
+    semver "^6.1.1"
+    sequelize-pool "^2.3.0"
     toposort-class "^1.0.1"
     uuid "^3.2.1"
-    validator "^10.4.0"
-    wkx "^0.4.1"
+    validator "^10.11.0"
+    wkx "^0.4.6"
 
 serve-static@1.12.3:
   version "1.12.3"
@@ -3225,21 +3266,6 @@ tar@^2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
-terraformer-wkt-parser@^1.1.2:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/terraformer-wkt-parser/-/terraformer-wkt-parser-1.2.0.tgz#c9d6ac3dff25f4c0bd344e961f42694961834c34"
-  integrity sha512-QU3iA54St5lF8Za1jg1oj4NYc8sn5tCZ08aNSWDeGzrsaV48eZk1iAVWasxhNspYBoCqdHuoot1pUTUrE1AJ4w==
-  dependencies:
-    "@types/geojson" "^1.0.0"
-    terraformer "~1.0.5"
-
-terraformer@~1.0.5:
-  version "1.0.9"
-  resolved "https://registry.yarnpkg.com/terraformer/-/terraformer-1.0.9.tgz#77851fef4a49c90b345dc53cf26809fdf29dcda6"
-  integrity sha512-YlmQ1fsMWTkKGDGibCRWgmLzrpDRUr63Q025LJ/taYQ6j1Yb8q9McKF7NBi6ACAyUXO6F/bl9w6v4MY307y5Ag==
-  optionalDependencies:
-    "@types/geojson" "^1.0.0"
-
 text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
@@ -3355,11 +3381,7 @@ uuid@^2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-2.0.3.tgz#67e2e863797215530dff318e5bf9dcebfd47b21a"
 
-uuid@^3.0.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
-
-uuid@^3.2.1:
+uuid@^3.0.0, uuid@^3.2.1:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
   integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==
@@ -3371,7 +3393,7 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "~1.0.0"
     spdx-expression-parse "~1.0.0"
 
-validator@^10.4.0:
+validator@^10.11.0:
   version "10.11.0"
   resolved "https://registry.yarnpkg.com/validator/-/validator-10.11.0.tgz#003108ea6e9a9874d31ccc9e5006856ccd76b228"
   integrity sha512-X/p3UZerAIsbBfN/IwahhYaBbY68EN/UQBWHtsbXGT5bfrH/p4NQzUCG1kF/rtKaNpnJ7jAu6NGTdSNtyNIXMw==
@@ -3397,10 +3419,10 @@ wide-align@^1.1.0:
   dependencies:
     string-width "^1.0.2"
 
-wkx@^0.4.1:
-  version "0.4.6"
-  resolved "https://registry.yarnpkg.com/wkx/-/wkx-0.4.6.tgz#228ab592e6457382ea6fb79fc825058d07fce523"
-  integrity sha512-LHxXlzRCYQXA9ZHgs8r7Gafh0gVOE8o3QmudM1PIkOdkXXjW7Thcl+gb2P2dRuKgW8cqkitCRZkkjtmWzpHi7A==
+wkx@^0.4.6:
+  version "0.4.8"
+  resolved "https://registry.yarnpkg.com/wkx/-/wkx-0.4.8.tgz#a092cf088d112683fdc7182fd31493b2c5820003"
+  integrity sha512-ikPXMM9IR/gy/LwiOSqWlSL3X/J5uk9EO2hHNRXS41eTLXaUFEVw9fn/593jW/tE5tedNg8YjT5HkCa4FqQZyQ==
   dependencies:
     "@types/node" "*"