Merge branch 'development' into fix/preSignedSignatureBug

* development:
  update error msg for dependency version check
  CI test for dependencies to have the same version (#1556)
  Add missing comma
  Decode NULL as false
  Update blog link to not be /latest, and use constant in mobile nav

41 files changed, 176 insertions, 102 deletions

diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 64054d288..d37988e26 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -85,7 +85,7 @@
         "@types/web3-provider-engine": "^14.0.0",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "web3-provider-engine": "14.0.6"
     },
     "publishConfig": {
diff --git a/packages/abi-gen-wrappers/package.json b/packages/abi-gen-wrappers/package.json
index 842ac024a..d30bc291d 100644
--- a/packages/abi-gen-wrappers/package.json
+++ b/packages/abi-gen-wrappers/package.json
@@ -38,7 +38,7 @@
         "@0x/web3-wrapper": "^3.2.4",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "shx": "^0.2.2"
     },
     "dependencies": {
diff --git a/packages/abi-gen/package.json b/packages/abi-gen/package.json
index 7f968893c..229b16906 100644
--- a/packages/abi-gen/package.json
+++ b/packages/abi-gen/package.json
@@ -37,7 +37,7 @@
         "ethereum-types": "^1.1.6",
         "glob": "^7.1.2",
         "handlebars": "^4.0.11",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "mkdirp": "^0.5.1",
         "sleep": "^5.1.1",
         "tmp": "^0.0.33",
@@ -48,15 +48,15 @@
         "@0x/tslint-config": "^2.0.2",
         "@types/glob": "5.0.35",
         "@types/handlebars": "^4.0.36",
-        "@types/mkdirp": "^0.5.1",
+        "@types/mkdirp": "^0.5.2",
         "@types/node": "*",
         "@types/sleep": "^0.0.7",
         "@types/tmp": "^0.0.33",
-        "@types/yargs": "^10.0.0",
-        "chai": "^4.1.2",
+        "@types/yargs": "^11.0.0",
+        "chai": "^4.0.1",
         "dirty-chai": "^2.0.1",
         "make-promises-safe": "^1.1.0",
-        "mocha": "^5.2.0",
+        "mocha": "^4.1.0",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "tslint": "5.11.0",
diff --git a/packages/assert/package.json b/packages/assert/package.json
index 38481d6f0..aed39d736 100644
--- a/packages/assert/package.json
+++ b/packages/assert/package.json
@@ -47,7 +47,7 @@
         "@0x/json-schemas": "^2.1.7",
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "valid-url": "^1.0.9"
     },
     "publishConfig": {
diff --git a/packages/asset-buyer/package.json b/packages/asset-buyer/package.json
index 0f79ac06a..05d28e3ee 100644
--- a/packages/asset-buyer/package.json
+++ b/packages/asset-buyer/package.json
@@ -47,11 +47,11 @@
         "@0x/utils": "^3.0.1",
         "@0x/web3-wrapper": "^3.2.4",
         "ethereum-types": "^1.1.6",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
-        "@types/lodash": "^4.14.116",
+        "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/node": "*",
         "chai": "^4.0.1",
diff --git a/packages/base-contract/package.json b/packages/base-contract/package.json
index db09b16a1..28c7aa2f4 100644
--- a/packages/base-contract/package.json
+++ b/packages/base-contract/package.json
@@ -45,7 +45,7 @@
         "@0x/web3-wrapper": "^3.2.4",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/connect/package.json b/packages/connect/package.json
index 15a4c12f1..4f00b2249 100644
--- a/packages/connect/package.json
+++ b/packages/connect/package.json
@@ -50,8 +50,8 @@
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
-        "lodash": "^4.17.5",
-        "query-string": "^5.0.1",
+        "lodash": "^4.17.11",
+        "query-string": "^6.0.0",
         "sinon": "^4.0.0",
         "uuid": "^3.3.2",
         "websocket": "^1.0.25"
@@ -61,7 +61,7 @@
         "@types/fetch-mock": "^6.0.3",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
-        "@types/query-string": "^5.0.1",
+        "@types/query-string": "^5.1.0",
         "@types/sinon": "^2.2.2",
         "@types/uuid": "^3.4.3",
         "@types/websocket": "^0.0.39",
diff --git a/packages/contract-addresses/package.json b/packages/contract-addresses/package.json
index 260322081..77a1ffc56 100644
--- a/packages/contract-addresses/package.json
+++ b/packages/contract-addresses/package.json
@@ -29,7 +29,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index cc7dc1a3e..9394c3c0e 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -45,7 +45,7 @@
         "@types/mocha": "^2.2.42",
         "@types/node": "*",
         "@types/sinon": "^2.2.2",
-        "@types/uuid": "^3.4.2",
+        "@types/uuid": "^3.4.3",
         "@types/web3-provider-engine": "^14.0.0",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
@@ -83,8 +83,8 @@
         "ethereumjs-util": "^5.1.1",
         "ethers": "~4.0.4",
         "js-sha3": "^0.7.0",
-        "lodash": "^4.17.5",
-        "uuid": "^3.1.0"
+        "lodash": "^4.17.11",
+        "uuid": "^3.3.2"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/dev-tools-pages/package.json b/packages/dev-tools-pages/package.json
index feab72856..b4e93d6c6 100644
--- a/packages/dev-tools-pages/package.json
+++ b/packages/dev-tools-pages/package.json
@@ -46,7 +46,7 @@
         "@types/node": "*",
         "@types/react": "^16.4.2",
         "@types/react-dom": "^16.0.7",
-        "@types/react-loadable": "^5.4.1",
+        "@types/react-loadable": "^5.4.2",
         "@types/react-lottie": "^1.2.0",
         "@types/react-router-dom": "^4.0.4",
         "@types/react-tabs": "^2.3.0",
diff --git a/packages/dev-utils/package.json b/packages/dev-utils/package.json
index 4ab1d6439..f1f37f638 100644
--- a/packages/dev-utils/package.json
+++ b/packages/dev-utils/package.json
@@ -49,7 +49,7 @@
         "@types/web3-provider-engine": "^14.0.0",
         "chai": "^4.0.1",
         "ethereum-types": "^1.1.6",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/fill-scenarios/package.json b/packages/fill-scenarios/package.json
index d882aba76..d4afd2187 100644
--- a/packages/fill-scenarios/package.json
+++ b/packages/fill-scenarios/package.json
@@ -38,7 +38,7 @@
         "@0x/web3-wrapper": "^3.2.4",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/instant/package.json b/packages/instant/package.json
index f7e15a3e0..147a47da8 100644
--- a/packages/instant/package.json
+++ b/packages/instant/package.json
@@ -55,15 +55,15 @@
         "bowser": "^1.9.4",
         "copy-to-clipboard": "^3.0.8",
         "ethereum-types": "^1.1.6",
-        "lodash": "^4.17.5",
-        "polished": "^2.2.0",
+        "lodash": "^4.17.11",
+        "polished": "^1.9.2",
         "react": "^16.5.2",
         "react-dom": "^16.5.2",
         "react-redux": "^5.0.7",
         "redux": "^4.0.0",
         "redux-devtools-extension": "^2.13.5",
         "rollbar": "^2.5.0",
-        "styled-components": "^4.0.2",
+        "styled-components": "^4.1.1",
         "ts-optchain": "^0.1.1"
     },
     "devDependencies": {
@@ -72,10 +72,10 @@
         "@types/enzyme": "^3.1.14",
         "@types/enzyme-adapter-react-16": "^1.0.3",
         "@types/jest": "^23.3.5",
-        "@types/lodash": "^4.14.116",
+        "@types/lodash": "4.14.104",
         "@types/node": "*",
-        "@types/react": "^16.4.16",
-        "@types/react-dom": "^16.0.8",
+        "@types/react": "16.4.16",
+        "@types/react-dom": "16.0.6",
         "@types/react-redux": "^6.0.9",
         "@types/redux": "^3.6.0",
         "@types/styled-components": "4.0.1",
@@ -103,7 +103,7 @@
         "typedoc": "0.13.0",
         "typescript": "3.0.1",
         "webpack": "^4.20.2",
-        "webpack-cli": "^3.1.1",
+        "webpack-cli": "3.1.2",
         "webpack-dev-server": "^3.1.9"
     },
     "publishConfig": {
diff --git a/packages/metacoin/package.json b/packages/metacoin/package.json
index 3b082f075..d08946fef 100644
--- a/packages/metacoin/package.json
+++ b/packages/metacoin/package.json
@@ -41,11 +41,11 @@
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
         "@0x/web3-wrapper": "^3.2.4",
-        "@types/mocha": "^5.2.2",
+        "@types/mocha": "^2.2.42",
         "copyfiles": "^2.0.0",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "run-s": "^0.0.0"
     },
     "devDependencies": {
diff --git a/packages/migrations/package.json b/packages/migrations/package.json
index 3ca4e8d6b..4096aa913 100644
--- a/packages/migrations/package.json
+++ b/packages/migrations/package.json
@@ -38,7 +38,7 @@
         "@0x/dev-utils": "^1.0.24",
         "@0x/tslint-config": "^2.0.2",
         "@0x/types": "^1.5.2",
-        "@types/yargs": "^10.0.0",
+        "@types/yargs": "^11.0.0",
         "make-promises-safe": "^1.1.0",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
@@ -61,7 +61,7 @@
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "ethereum-types": "^1.1.6",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "optionalDependencies": {
         "@ledgerhq/hw-transport-node-hid": "^4.3.0"
diff --git a/packages/monorepo-scripts/package.json b/packages/monorepo-scripts/package.json
index 187a80c93..b1e1f3ca1 100644
--- a/packages/monorepo-scripts/package.json
+++ b/packages/monorepo-scripts/package.json
@@ -32,13 +32,13 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/monorepo-scripts/README.md",
     "devDependencies": {
-        "@types/glob": "^5.0.33",
+        "@types/glob": "5.0.35",
         "@types/mkdirp": "^0.5.2",
         "@types/node": "*",
         "@types/opn": "^5.1.0",
         "@types/rimraf": "^2.0.2",
         "@types/semver": "5.5.0",
-        "@types/yargs": "^10.0.0",
+        "@types/yargs": "^11.0.0",
         "depcheck": "^0.6.9",
         "make-promises-safe": "^1.1.0",
         "npm-run-all": "^4.1.2",
@@ -55,7 +55,7 @@
         "es6-promisify": "^5.0.0",
         "glob": "^7.1.2",
         "isomorphic-fetch": "2.2.1",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "mkdirp": "^0.5.1",
         "moment": "2.21.0",
         "opn": "^5.3.0",
diff --git a/packages/monorepo-scripts/src/deps_versions.ts b/packages/monorepo-scripts/src/deps_versions.ts
index 1053906b7..0d01a2e3c 100644
--- a/packages/monorepo-scripts/src/deps_versions.ts
+++ b/packages/monorepo-scripts/src/deps_versions.ts
@@ -3,7 +3,7 @@
 import chalk from 'chalk';
 import * as fs from 'fs';
 import { sync as globSync } from 'glob';
-import * as _ from 'lodash';
+import * as path from 'path';
 
 import { utils } from './utils/utils';
 
@@ -17,11 +17,34 @@ interface VersionsByDependency {
     [depName: string]: Versions;
 }
 
-const PACKAGE_JSON_GLOB = '../*/package.json';
+interface ParsedDependencies {
+    ignored: VersionsByDependency;
+    included: VersionsByDependency;
+}
+
+const PACKAGE_JSON_GLOB = '../../*/package.json';
+
+const config = JSON.parse(fs.readFileSync(path.join(__dirname, '../../../package.json')).toString()).config;
+const dependenciesWithIgnoredVersions: string[] = config.ignoreDependencyVersions.split(' ');
+const packagesWithIgnoredVersions: string[] = config.ignoreDependencyVersionsForPackage.split(' ');
+
+if (require.main === module) {
+    const dependencies = parseDependencies();
+    const ignoredMultiples = getDependenciesWithMultipleVersions(dependencies.ignored);
+    const multiples = getDependenciesWithMultipleVersions(dependencies.included);
+    printVersionsByDependency(multiples);
+    utils.log(`├── ${chalk.bold('IGNORED')}`);
+    printVersionsByDependency(ignoredMultiples);
+    if (Object.keys(multiples).length !== 0) {
+        utils.log(
+            `Some dependencies have multiple versions. Please fix by trying to find compatible versions. As a last resort, you can add space-separated exceptions to root package.json config.ignoreDependencyVersions`,
+        );
+        process.exit(1);
+    }
+}
 
-// tslint:disable:no-unused-variable
-function getDependencies(path: string): Dependencies {
-    const file = fs.readFileSync(path).toString();
+function getDependencies(_path: string): Dependencies {
+    const file = fs.readFileSync(_path).toString();
     const parsed = JSON.parse(file);
     const dependencies = {
         ...parsed.dependencies,
@@ -30,27 +53,49 @@ function getDependencies(path: string): Dependencies {
     return dependencies;
 }
 
-const files = globSync(PACKAGE_JSON_GLOB);
-const versionsByDependency: VersionsByDependency = {};
-files.map(path => {
-    const [_1, packageName, _2] = path.split('/');
-    const dependencies = getDependencies(path);
-    _.map(dependencies, (version: string, depName: string) => {
-        if (_.isUndefined(versionsByDependency[depName])) {
-            versionsByDependency[depName] = {};
-        }
-        versionsByDependency[depName][packageName] = version;
+function parseDependencies(): ParsedDependencies {
+    const files = globSync(path.join(__dirname, PACKAGE_JSON_GLOB));
+    const parsedDependencies: ParsedDependencies = {
+        ignored: {},
+        included: {},
+    };
+    files.map(_path => {
+        const pathParts = _path.split('/');
+        const packageName = pathParts[pathParts.length - 2];
+        const packageCategory = packagesWithIgnoredVersions.includes(packageName) ? 'ignored' : 'included';
+        const dependencies = getDependencies(_path);
+        Object.keys(dependencies).forEach((depName: string) => {
+            const category = dependenciesWithIgnoredVersions.includes(depName) ? 'ignored' : packageCategory;
+            if (parsedDependencies[category][depName] === undefined) {
+                parsedDependencies[category][depName] = {};
+            }
+            const version = dependencies[depName];
+            parsedDependencies[category][depName][packageName] = version;
+        });
     });
-});
+    return parsedDependencies;
+}
+
+function getDependenciesWithMultipleVersions(versionsByDependency: VersionsByDependency): VersionsByDependency {
+    return Object.keys(versionsByDependency)
+        .filter((depName: string) => hasMultipleVersions(versionsByDependency[depName]))
+        .reduce<VersionsByDependency>((obj, depName: string) => {
+            obj[depName] = versionsByDependency[depName];
+            return obj;
+        }, {});
+}
 
-_.map(versionsByDependency, (versions: Versions, depName: string) => {
-    if (_.uniq(_.values(versions)).length === 1) {
-        delete versionsByDependency[depName];
-    } else {
+function printVersionsByDependency(versionsByDependency: VersionsByDependency): void {
+    Object.keys(versionsByDependency).forEach((depName: string) => {
+        const versions: Versions = versionsByDependency[depName];
         utils.log(chalk.bold(depName));
-        _.map(versions, (version: string, packageName: string) => {
-            utils.log(`├── ${packageName} -> ${version}`);
+        Object.keys(versions).forEach((packageName: string) => {
+            utils.log(`├── ${packageName} -> ${versions[packageName]}`);
         });
-    }
-});
-// tslint:disable:no-unused-variable
+    });
+}
+
+function hasMultipleVersions(versions: Versions): boolean {
+    const uniques = new Set(Object.values(versions));
+    return uniques.size > 1;
+}
diff --git a/packages/order-utils/package.json b/packages/order-utils/package.json
index 4e31d4094..cca0182a0 100644
--- a/packages/order-utils/package.json
+++ b/packages/order-utils/package.json
@@ -69,7 +69,7 @@
         "ethereumjs-abi": "0.6.5",
         "ethereumjs-util": "^5.1.1",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/order-watcher/package.json b/packages/order-watcher/package.json
index 895c64813..dad36b04f 100644
--- a/packages/order-watcher/package.json
+++ b/packages/order-watcher/package.json
@@ -80,7 +80,7 @@
         "ethereum-types": "^1.1.6",
         "ethereumjs-blockstream": "6.0.0",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "websocket": "^1.0.25"
     },
     "publishConfig": {
diff --git a/packages/pipeline/package.json b/packages/pipeline/package.json
index 908734687..a8b89c7b5 100644
--- a/packages/pipeline/package.json
+++ b/packages/pipeline/package.json
@@ -30,11 +30,11 @@
         "@0x/tslint-config": "^2.0.2",
         "@types/axios": "^0.14.0",
         "@types/ramda": "^0.25.38",
-        "chai": "^4.1.2",
-        "chai-as-promised": "^7.1.1",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
         "chai-bignumber": "^3.0.0",
         "dirty-chai": "^2.0.1",
-        "mocha": "^5.2.0",
+        "mocha": "^4.1.0",
         "tslint": "5.11.0",
         "typescript": "3.0.1"
     },
@@ -42,7 +42,7 @@
         "@0x/connect": "^3.0.13",
         "@0x/contract-addresses": "^2.2.0",
         "@0x/contract-artifacts": "^1.3.0",
-        "@0x/contract-wrappers": "^3.0.0",
+        "@0x/contract-wrappers": "^5.0.1",
         "@0x/dev-utils": "^1.0.24",
         "@0x/order-utils": "^3.1.2",
         "@0x/subproviders": "^2.1.11",
diff --git a/packages/react-docs/package.json b/packages/react-docs/package.json
index f8f2b6276..dc592f2a0 100644
--- a/packages/react-docs/package.json
+++ b/packages/react-docs/package.json
@@ -30,7 +30,7 @@
         "@types/styled-components": "4.0.0",
         "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2",
-        "tslint": "^5.9.1",
+        "tslint": "5.11.0",
         "typescript": "3.0.1"
     },
     "dependencies": {
@@ -45,7 +45,7 @@
         "@types/react-scroll": "1.5.3",
         "basscss": "^8.0.3",
         "compare-versions": "^3.0.1",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "material-ui": "^0.20.0",
         "react": "^16.5.2",
         "react-dom": "^16.5.2",
@@ -53,7 +53,7 @@
         "react-scroll": "0xproject/react-scroll#pr-330-and-replace-state",
         "react-tooltip": "^3.2.7",
         "semver": "5.5.0",
-        "styled-components": "^4.0.1"
+        "styled-components": "^4.1.1"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/react-shared/package.json b/packages/react-shared/package.json
index 4be4742b0..b527e51a3 100644
--- a/packages/react-shared/package.json
+++ b/packages/react-shared/package.json
@@ -29,7 +29,7 @@
         "@0x/tslint-config": "^2.0.2",
         "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2",
-        "tslint": "^5.9.1",
+        "tslint": "5.11.0", 
         "typescript": "3.0.1"
     },
     "dependencies": {
@@ -37,7 +37,7 @@
         "@material-ui/core": "^3.0.1",
         "@types/is-mobile": "0.3.0",
         "@types/lodash": "4.14.104",
-        "@types/material-ui": "0.18.0",
+        "@types/material-ui": "^0.20.0",
         "@types/node": "*",
         "@types/react": "*",
         "@types/react-dom": "*",
@@ -48,15 +48,15 @@
         "basscss": "^8.0.3",
         "change-case": "^3.0.2",
         "is-mobile": "^0.2.2",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "material-ui": "^0.20.0",
         "react": "^16.5.2",
         "react-dom": "^16.5.2",
-        "react-highlight": "0xproject/react-highlight#fix/react-version",
+        "react-highlight": "0xproject/react-highlight",
         "react-markdown": "^3.2.2",
-        "react-router-dom": "^4.1.1",
+        "react-router-dom": "^4.3.1",
         "react-scroll": "0xproject/react-scroll#pr-330-and-replace-state",
-        "styled-components": "^4.0.1",
+        "styled-components": "^4.1.1",
         "valid-url": "^1.0.9"
     },
     "publishConfig": {
diff --git a/packages/sol-compiler/package.json b/packages/sol-compiler/package.json
index 0b53cffd5..eab0e5a2b 100644
--- a/packages/sol-compiler/package.json
+++ b/packages/sol-compiler/package.json
@@ -48,7 +48,7 @@
         "@types/mkdirp": "^0.5.2",
         "@types/pluralize": "^0.0.29",
         "@types/require-from-string": "^1.2.0",
-        "@types/semver": "^5.5.0",
+        "@types/semver": "5.5.0",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
         "chai-bignumber": "^3.0.0",
@@ -79,7 +79,7 @@
         "chokidar": "^2.0.4",
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "mkdirp": "^0.5.1",
         "pluralize": "^7.0.0",
         "require-from-string": "^2.0.1",
diff --git a/packages/sol-coverage/package.json b/packages/sol-coverage/package.json
index 805e2e670..259c20256 100644
--- a/packages/sol-coverage/package.json
+++ b/packages/sol-coverage/package.json
@@ -33,7 +33,7 @@
         "@0x/subproviders": "^2.1.11",
         "@0x/typescript-typings": "^3.0.8",
         "ethereum-types": "^1.1.6",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
diff --git a/packages/sol-doc/package.json b/packages/sol-doc/package.json
index 179f45e81..8dfe236e0 100644
--- a/packages/sol-doc/package.json
+++ b/packages/sol-doc/package.json
@@ -30,17 +30,17 @@
         "@0x/utils": "^3.0.1",
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
-        "lodash": "^4.17.10",
-        "yargs": "^12.0.2"
+        "lodash": "^4.17.11",
+        "yargs": "^10.0.3"
     },
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
-        "chai": "^4.1.2",
+        "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
         "chai-bignumber": "^3.0.0",
         "dirty-chai": "^2.0.1",
         "make-promises-safe": "^1.1.0",
-        "mocha": "^5.2.0",
+        "mocha": "^4.1.0",
         "shx": "^0.2.2",
         "source-map-support": "^0.5.0",
         "tslint": "5.11.0"
diff --git a/packages/sol-profiler/package.json b/packages/sol-profiler/package.json
index 4fe2928c7..57821795d 100644
--- a/packages/sol-profiler/package.json
+++ b/packages/sol-profiler/package.json
@@ -33,7 +33,7 @@
         "@0x/subproviders": "^2.1.11",
         "@0x/typescript-typings": "^3.0.8",
         "ethereum-types": "^1.1.6",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
diff --git a/packages/sol-resolver/package.json b/packages/sol-resolver/package.json
index 0518cde95..a59ef9dca 100644
--- a/packages/sol-resolver/package.json
+++ b/packages/sol-resolver/package.json
@@ -32,7 +32,7 @@
     "dependencies": {
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/sol-trace/package.json b/packages/sol-trace/package.json
index 25e81a82a..ba302daf7 100644
--- a/packages/sol-trace/package.json
+++ b/packages/sol-trace/package.json
@@ -35,7 +35,7 @@
         "chalk": "^2.3.0",
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "loglevel": "^1.6.1"
     },
     "devDependencies": {
diff --git a/packages/sol-tracing-utils/package.json b/packages/sol-tracing-utils/package.json
index 929c73b84..df800976c 100644
--- a/packages/sol-tracing-utils/package.json
+++ b/packages/sol-tracing-utils/package.json
@@ -55,7 +55,7 @@
         "glob": "^7.1.2",
         "chalk": "^2.3.0",
         "istanbul": "^0.4.5",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "loglevel": "^1.6.1",
         "mkdirp": "^0.5.1",
         "rimraf": "^2.6.2",
@@ -66,7 +66,7 @@
         "@0x/tslint-config": "^2.0.2",
         "@types/istanbul": "^0.4.30",
         "@types/loglevel": "^1.5.3",
-        "@types/mkdirp": "^0.5.1",
+        "@types/mkdirp": "^0.5.2",
         "@types/mocha": "^2.2.42",
         "@types/node": "*",
         "@types/rimraf": "^2.0.2",
diff --git a/packages/sra-spec/package.json b/packages/sra-spec/package.json
index 9c4c0a24f..1afe3d945 100644
--- a/packages/sra-spec/package.json
+++ b/packages/sra-spec/package.json
@@ -41,14 +41,14 @@
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
         "@types/mocha": "^2.2.42",
-        "@types/node": "^10.5.3",
+        "@types/node": "*",
         "chai": "^4.0.1",
         "chokidar-cli": "^1.2.0",
         "copyfiles": "^2.0.0",
         "dirty-chai": "^2.0.1",
         "discharge": "^0.7.1",
-        "mocha": "^4.0.1",
-        "npm-run-all": "^4.1.3",
+        "mocha": "^4.1.0",
+        "npm-run-all": "^4.1.2",
         "nyc": "^11.0.1",
         "redoc-cli": "^0.6.1",
         "shx": "^0.2.2",
diff --git a/packages/subproviders/package.json b/packages/subproviders/package.json
index b54cc11db..4a7e36075 100644
--- a/packages/subproviders/package.json
+++ b/packages/subproviders/package.json
@@ -49,7 +49,7 @@
         "ganache-core": "^2.3.3",
         "hdkey": "^0.7.1",
         "json-rpc-error": "2.0.0",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "semaphore-async-await": "^1.5.1",
         "web3-provider-engine": "14.0.6"
     },
diff --git a/packages/testnet-faucets/package.json b/packages/testnet-faucets/package.json
index da7477be4..609f00b03 100644
--- a/packages/testnet-faucets/package.json
+++ b/packages/testnet-faucets/package.json
@@ -28,8 +28,8 @@
         "ethereumjs-tx": "^1.3.5",
         "ethereumjs-util": "^5.1.1",
         "express": "^4.15.2",
-        "lodash": "^4.17.5",
-        "rollbar": "^0.6.5"
+        "lodash": "^4.17.11",
+        "rollbar": "^2.5.0"
     },
     "devDependencies": {
         "@0x/tslint-config": "^2.0.2",
diff --git a/packages/tslint-config/package.json b/packages/tslint-config/package.json
index f90321edb..6f738c8d8 100644
--- a/packages/tslint-config/package.json
+++ b/packages/tslint-config/package.json
@@ -40,7 +40,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.11",
         "tslint": "5.11.0",
         "tslint-eslint-rules": "5.4.0",
         "tslint-react": "^3.2.0",
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index 0fb199e58..df415040b 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "4.0.1",
+        "changes": [
+            {
+                "note": "ABI Decode NULL as False",
+                "pr": 1582
+            }
+        ]
+    },
+    {
         "version": "4.0.0",
         "changes": [
             {
diff --git a/packages/utils/package.json b/packages/utils/package.json
index b6be39210..e6364c77a 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -49,14 +49,14 @@
         "@types/node": "*",
         "abortcontroller-polyfill": "^1.1.9",
         "bignumber.js": "~8.0.2",
-        "chalk": "^2.4.1",
+        "chalk": "^2.3.0",
         "detect-node": "2.0.3",
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
         "ethers": "~4.0.4",
-        "isomorphic-fetch": "^2.2.1",
+        "isomorphic-fetch": "2.2.1",
         "js-sha3": "^0.7.0",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/utils/src/abi_encoder/evm_data_types/bool.ts b/packages/utils/src/abi_encoder/evm_data_types/bool.ts
index 23298bc88..ffccd6e53 100644
--- a/packages/utils/src/abi_encoder/evm_data_types/bool.ts
+++ b/packages/utils/src/abi_encoder/evm_data_types/bool.ts
@@ -36,7 +36,8 @@ export class BoolDataType extends AbstractBlobDataType {
     public decodeValue(calldata: RawCalldata): boolean {
         const valueBuf = calldata.popWord();
         const valueHex = ethUtil.bufferToHex(valueBuf);
-        const valueNumber = new BigNumber(valueHex, constants.HEX_BASE);
+        // Hack @hysz: there are some cases where `false` is encoded as 0x instead of 0x0.
+        const valueNumber = valueHex === '0x' ? new BigNumber(0) : new BigNumber(valueHex, constants.HEX_BASE);
         if (!(valueNumber.isEqualTo(0) || valueNumber.isEqualTo(1))) {
             throw new Error(`Failed to decode boolean. Expected 0x0 or 0x1, got ${valueHex}`);
         }
diff --git a/packages/utils/test/abi_encoder/evm_data_types_test.ts b/packages/utils/test/abi_encoder/evm_data_types_test.ts
index 4814ce28b..c146890e0 100644
--- a/packages/utils/test/abi_encoder/evm_data_types_test.ts
+++ b/packages/utils/test/abi_encoder/evm_data_types_test.ts
@@ -489,6 +489,24 @@ describe('ABI Encoder: EVM Data Type Encoding/Decoding', () => {
             const argsEncodedFromSignature = dataTypeFromSignature.encode(args);
             expect(argsEncodedFromSignature).to.be.deep.equal(expectedEncodedArgs);
         });
+        it('Null should decode as False', async () => {
+            // Hack @hysz: there are some cases where `false` is encoded as 0x instead of 0x0.
+            // Create DataType object
+            const testDataItem = { name: 'Boolean', type: 'bool' };
+            const dataType = new AbiEncoder.Bool(testDataItem);
+            // Construct args to be encoded
+            const args = false;
+            // Encode Args and validate result
+            const encodedArgs = '0x';
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000000';
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+            // Validate signature
+            const dataTypeFromSignature = AbiEncoder.create(dataType.getSignature(true));
+            const argsEncodedFromSignature = dataTypeFromSignature.encode(args);
+            expect(argsEncodedFromSignature).to.be.deep.equal(expectedEncodedArgs);
+        });
     });
 
     describe('Integer', () => {
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index f28cc36ca..c31226499 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -61,7 +61,7 @@
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
         "ethers": "~4.0.4",
-        "lodash": "^4.17.5"
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/website/package.json b/packages/website/package.json
index ce7ed395f..7ce752622 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -97,7 +97,7 @@
         "@types/rc-slider": "^8.6.0",
         "@types/react": "^16.7.7",
         "@types/react-copy-to-clipboard": "^4.2.0",
-        "@types/react-dom": "^16.0.7",
+        "@types/react-dom": "^16.0.6",
         "@types/react-helmet": "^5.0.6",
         "@types/react-redux": "^4.4.37",
         "@types/react-scroll": "1.5.3",
diff --git a/packages/website/ts/components/mobileNav.tsx b/packages/website/ts/components/mobileNav.tsx
index d43bbe50e..1aa826755 100644
--- a/packages/website/ts/components/mobileNav.tsx
+++ b/packages/website/ts/components/mobileNav.tsx
@@ -6,6 +6,7 @@ import { Link } from 'react-router-dom';
 
 import { WrapGrid, WrapProps } from 'ts/components/newLayout';
 import { WebsitePaths } from 'ts/types';
+import { constants } from 'ts/utils/constants';
 
 interface Props {
     isToggled: boolean;
@@ -41,7 +42,7 @@ export class MobileNav extends React.PureComponent<Props> {
                                 <Link to={WebsitePaths.AboutMission}>About</Link>
                             </li>
                             <li>
-                                <a href="https://blog.0xproject.com/latest" target="_blank">
+                                <a href={constants.URL_BLOG} target="_blank">
                                     Blog
                                 </a>
                             </li>
diff --git a/packages/website/ts/utils/constants.ts b/packages/website/ts/utils/constants.ts
index ada8de549..03c1a0b83 100644
--- a/packages/website/ts/utils/constants.ts
+++ b/packages/website/ts/utils/constants.ts
@@ -74,7 +74,7 @@ export const constants = {
     URL_ANGELLIST: 'https://angel.co/0xproject/jobs',
     URL_APACHE_LICENSE: 'http://www.apache.org/licenses/LICENSE-2.0',
     URL_BITLY_API: 'https://api-ssl.bitly.com',
-    URL_BLOG: 'https://blog.0xproject.com/latest',
+    URL_BLOG: 'https://blog.0xproject.com',
     URL_DISCOURSE_FORUM: 'https://forum.0x.org',
     URL_ECOSYSTEM_APPLY: 'https://0x.smapply.io/',
     URL_ECOSYSTEM_BLOG_POST: 'https://blog.0xproject.com/announcing-the-0x-ecosystem-acceleration-program-89d1cb89d565',