diff --git a/CHANGELOG.md b/CHANGELOG.md
index b840410..7d18e4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+- 2017-10-09 - v4.0.0
+- 2017-10-09 - Optimised Sequelize UUID column type for ids.
 - 2017-10-02 - v3.0.0
 - 2017-10-02 - Allow injecting a Sequelize instance.
 - 2017-10-02 - Fix npm scripts on MS Windows.
diff --git a/package-lock.json b/package-lock.json
index 9967247..382e600 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "jsonapi-store-relationaldb",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10,9 +10,9 @@
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+      "version": "8.0.33",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.0.33.tgz",
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@@ -276,9 +276,9 @@
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-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.0.tgz",
-      "integrity": "sha1-eRQg1/VR7qKJdFOop3ZT+WYG1nw="
+      "version": "3.5.1",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
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     },
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@@ -716,9 +716,9 @@
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-      "resolved": "https://registry.npmjs.org/diff/-/diff-3.2.0.tgz",
-      "integrity": "sha1-yc45Okt8vQsFinJck98pkCeGj/k=",
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-3.3.1.tgz",
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       "dev": true
     },
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@@ -1642,9 +1642,9 @@
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-      "resolved": "https://registry.npmjs.org/growl/-/growl-1.9.2.tgz",
-      "integrity": "sha1-Dqd0NxXbjY3ixe3hd14bRayFwC8=",
+      "version": "1.10.3",
+      "resolved": "https://registry.npmjs.org/growl/-/growl-1.10.3.tgz",
+      "integrity": "sha512-hKlsbA5Vu3xsh1Cg3J7jSmX/WaW6A5oBeqzM88oNbCRQFz+zUaXm6yxS4RVytp1scBoJzSYl4YAEOQIt6O8V1Q==",
       "dev": true
     },
     "har-schema": {
@@ -1985,9 +1985,9 @@
       "dev": true
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-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/joi/-/joi-11.1.1.tgz",
-      "integrity": "sha512-hffQzH42mYLvUCqhUPZZGegiiIjVvHcOV8mrxXPci8qZFOp2sHK4778GPyI3ZlvqTOHs8qZN6DovDnBR1slO4g==",
+      "version": "11.3.4",
+      "resolved": "https://registry.npmjs.org/joi/-/joi-11.3.4.tgz",
+      "integrity": "sha512-2eytkbHJ0qhXaNgElrKFrruv1sZ8MtuFg7fJe1Linb028x/3+flYsrtZIc+7wYVY7oCtXv6Ou7dCzAZaV/Qubg==",
       "requires": {
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         "isemail": "3.0.0",
@@ -2092,12 +2092,6 @@
       "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=",
       "dev": true
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-    "json3": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/json3/-/json3-3.3.2.tgz",
-      "integrity": "sha1-PAQ0dD35Pi9cQq7nsZvLSDV19OE=",
-      "dev": true
-    },
     "jsonapi-server": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/jsonapi-server/-/jsonapi-server-3.2.1.tgz",
@@ -2270,40 +2264,6 @@
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       "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
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-    "lodash._baseassign": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz",
-      "integrity": "sha1-jDigmVAPIVrQnlnxci/QxSv+Ck4=",
-      "dev": true,
-      "requires": {
-        "lodash._basecopy": "3.0.1",
-        "lodash.keys": "3.1.2"
-      }
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-    "lodash._basecopy": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/lodash._basecopy/-/lodash._basecopy-3.0.1.tgz",
-      "integrity": "sha1-jaDmqHbPNEwK2KVIghEd08XHyjY=",
-      "dev": true
-    },
-    "lodash._basecreate": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/lodash._basecreate/-/lodash._basecreate-3.0.3.tgz",
-      "integrity": "sha1-G8ZhYU2qf8MRt9A78WgGoCE8+CE=",
-      "dev": true
-    },
-    "lodash._getnative": {
-      "version": "3.9.1",
-      "resolved": "https://registry.npmjs.org/lodash._getnative/-/lodash._getnative-3.9.1.tgz",
-      "integrity": "sha1-VwvH3t5G1hzc3mh9ZdPuy6o6r/U=",
-      "dev": true
-    },
-    "lodash._isiterateecall": {
-      "version": "3.0.9",
-      "resolved": "https://registry.npmjs.org/lodash._isiterateecall/-/lodash._isiterateecall-3.0.9.tgz",
-      "integrity": "sha1-UgOte6Ql+uhCRg5pbbnPPmqsBXw=",
-      "dev": true
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     "lodash.assign": {
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       "resolved": "https://registry.npmjs.org/lodash.assign/-/lodash.assign-4.2.0.tgz",
@@ -2316,46 +2276,12 @@
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-    "lodash.create": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/lodash.create/-/lodash.create-3.1.1.tgz",
-      "integrity": "sha1-1/KEnw29p+BGgruM1yqwIkYd6+c=",
-      "dev": true,
-      "requires": {
-        "lodash._baseassign": "3.2.0",
-        "lodash._basecreate": "3.0.3",
-        "lodash._isiterateecall": "3.0.9"
-      }
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-    "lodash.isarguments": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz",
-      "integrity": "sha1-L1c9hcaiQon/AGY7SRwdM4/zRYo=",
-      "dev": true
-    },
-    "lodash.isarray": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/lodash.isarray/-/lodash.isarray-3.0.4.tgz",
-      "integrity": "sha1-eeTriMNqgSKvhvhEqpvNhRtfu1U=",
-      "dev": true
-    },
     "lodash.isequal": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
       "integrity": "sha1-QVxEePK8wwEgwizhDtMib30+GOA=",
       "dev": true
     },
-    "lodash.keys": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/lodash.keys/-/lodash.keys-3.1.2.tgz",
-      "integrity": "sha1-TbwEcrFWvlCgsoaFXRvQsMZWCYo=",
-      "dev": true,
-      "requires": {
-        "lodash._getnative": "3.9.1",
-        "lodash.isarguments": "3.1.0",
-        "lodash.isarray": "3.0.4"
-      }
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     "lodash.omit": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/lodash.omit/-/lodash.omit-4.5.0.tgz",
@@ -2509,61 +2435,36 @@
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-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-3.5.3.tgz",
-      "integrity": "sha512-/6na001MJWEtYxHOV1WLfsmR4YIynkUEhBwzsb+fk2qmQ3iqsi258l/Q2MWHJMImAcNpZ8DEdYAK72NHoIQ9Eg==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-4.0.1.tgz",
+      "integrity": "sha512-evDmhkoA+cBNiQQQdSKZa2b9+W2mpLoj50367lhy+Klnx9OV8XlCIhigUnn1gaTFLQCa0kdNhEGDr0hCXOQFDw==",
       "dev": true,
       "requires": {
         "browser-stdout": "1.3.0",
-        "commander": "2.9.0",
-        "debug": "2.6.8",
-        "diff": "3.2.0",
+        "commander": "2.11.0",
+        "debug": "3.1.0",
+        "diff": "3.3.1",
         "escape-string-regexp": "1.0.5",
-        "glob": "7.1.1",
-        "growl": "1.9.2",
+        "glob": "7.1.2",
+        "growl": "1.10.3",
         "he": "1.1.1",
-        "json3": "3.3.2",
-        "lodash.create": "3.1.1",
         "mkdirp": "0.5.1",
-        "supports-color": "3.1.2"
+        "supports-color": "4.4.0"
       },
       "dependencies": {
-        "debug": {
-          "version": "2.6.8",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-          "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
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-        "glob": {
-          "version": "7.1.1",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.1.tgz",
-          "integrity": "sha1-gFIR3wT6rxxjo2ADBs31reULLsg=",
-          "dev": true,
-          "requires": {
-            "fs.realpath": "1.0.0",
-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
-          }
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-        "has-flag": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-1.0.0.tgz",
-          "integrity": "sha1-nZ55MWXOAXoA8AQYxD+UKnsdEfo=",
+        "commander": {
+          "version": "2.11.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.11.0.tgz",
+          "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ==",
           "dev": true
         },
         "supports-color": {
-          "version": "3.1.2",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.1.2.tgz",
-          "integrity": "sha1-cqJiiU2dQIuVbKBf83su2KbiotU=",
+          "version": "4.4.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.4.0.tgz",
+          "integrity": "sha512-rKC3+DyXWgK0ZLKwmRsrkyHVZAjNkfzeehuFWdGGcqGDTZFH73+RH6S/RDAAxl9GusSjZSUWYLmT9N5pzXFOXQ==",
           "dev": true,
           "requires": {
-            "has-flag": "1.0.0"
+            "has-flag": "2.0.0"
           }
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@@ -3775,7 +3676,7 @@
       "resolved": "https://registry.npmjs.org/retry-as-promised/-/retry-as-promised-2.3.1.tgz",
       "integrity": "sha1-91BZGD+XMHccCbrR7tV1N5McvJ0=",
       "requires": {
-        "bluebird": "3.5.0",
+        "bluebird": "3.5.1",
         "debug": "2.6.9"
       },
       "dependencies": {
@@ -3872,11 +3773,11 @@
       "dev": true
     },
     "sequelize": {
-      "version": "4.13.1",
-      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-4.13.1.tgz",
-      "integrity": "sha512-V22i5H/tF+oidYaM59ute/T8hG7RaOKuMFeePzi9YKQudTNZm4W1ABheGY+EE3kHfLU8+jjTLDGDr4xJ6lsBwg==",
+      "version": "4.13.8",
+      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-4.13.8.tgz",
+      "integrity": "sha512-7CUPFrIVbhNF2p7hxtnwofzcgHW7noECulu5cvb2u1du4GFpFtkb0TZD923tcViAeRUiweu9c3NrzzOtS5t0+g==",
       "requires": {
-        "bluebird": "3.5.0",
+        "bluebird": "3.5.1",
         "cls-bluebird": "2.0.1",
         "debug": "3.1.0",
         "depd": "1.1.1",
@@ -5291,7 +5192,7 @@
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       "integrity": "sha1-d201pjSlwi5lbkdEvetU+D/Szo0=",
       "requires": {
-        "@types/node": "8.0.31"
+        "@types/node": "8.0.33"
       }
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     "wordwrap": {
diff --git a/package.json b/package.json
index 9e64376..d720da5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsonapi-store-relationaldb",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "Relational data store for jsonapi-server.",
   "keywords": [
     "json:api",
@@ -24,10 +24,10 @@
   "dependencies": {
     "async": "2.5.0",
     "debug": "3.1.0",
-    "joi": "11.1.1",
+    "joi": "11.3.4",
     "lodash": "4.17.4",
     "semver": "5.4.1",
-    "sequelize": "4.13.1"
+    "sequelize": "4.13.8"
   },
   "devDependencies": {
     "blanket": "1.2.3",
@@ -42,7 +42,7 @@
     "jsonapi-server": "3.2.1",
     "lokka": "1.7.0",
     "lokka-transport-http": "1.6.1",
-    "mocha": "3.5.3",
+    "mocha": "4.0.1",
     "mocha-lcov-reporter": "1.3.0",
     "mocha-performance": "0.1.1",
     "mysql2": "1.4.2",
@@ -53,10 +53,10 @@
     "v8-profiler": "5.7.0"
   },
   "scripts": {
-    "test": "bash -c './setupDatabase.sh jsonapi-relationaldb-test $SEQUELIZE_DIALECT && ./node_modules/mocha/bin/mocha --timeout 20000 -R spec ./test/*.js'",
+    "test": "bash -c './setupDatabase.sh jsonapi-relationaldb-test $SEQUELIZE_DIALECT && mocha --exit --timeout 20000 -R spec ./test/*.js'",
     "start": "node example/server.js",
-    "coveralls": "mocha --require blanket --reporter mocha-lcov-reporter ./test/*.js | ./node_modules/coveralls/bin/coveralls.js",
-    "coverage": "mocha --timeout 20000 --require blanket --reporter html-cov ./test/*.js > coverage.html || true",
+    "coveralls": "mocha --exit --require blanket --reporter mocha-lcov-reporter ./test/*.js | ./node_modules/coveralls/bin/coveralls.js",
+    "coverage": "mocha --exit --timeout 20000 --require blanket --reporter html-cov ./test/*.js > coverage.html || true",
     "complexity": "plato -r -d complexity lib",
     "performance": "node --allow-natives-syntax --harmony ./node_modules/mocha/bin/_mocha --reporter mocha-performance ./test/*.js",
     "lint": "eslint ./example/*.js ./lib/* ./test/*.js --quiet && echo '✔ All good!'",