diff --git a/package.json b/package.json
index 6a1dc13875..09e5560416 100644
--- a/package.json
+++ b/package.json
@@ -26,8 +26,8 @@
     "@babel/core": "^7.4.5",
     "@babel/register": "^7.4.4",
     "@babel/runtime": "^7.4.5",
-    "@polkadot/dev": "^0.30.0-beta.8",
-    "@polkadot/ts": "^0.1.58",
+    "@polkadot/dev": "^0.30.0-beta.10",
+    "@polkadot/ts": "^0.1.59",
     "gh-pages": "^2.0.1"
   }
 }
diff --git a/packages/api-derive/src/type/HeaderExtended.ts b/packages/api-derive/src/type/HeaderExtended.ts
index 3c486bb362..fe42ccb14e 100644
--- a/packages/api-derive/src/type/HeaderExtended.ts
+++ b/packages/api-derive/src/type/HeaderExtended.ts
@@ -19,28 +19,39 @@ export default class HeaderExtended extends Header {
       return;
     }
 
-    let item = header.digest.logs.find((log) => log.isConsensus);
     let slot: u64 | undefined;
+    const [pitem] = header.digest.logsWith('PreRuntime');
 
-    // extract author from the consensus (substrate 1.0, digest)
-    if (item) {
-      const consensus = item.asConsensus;
+    // extract from the substrate 2.0 PreRuntime digest
+    if (pitem) {
+      const preRuntime = pitem.asPreRuntime;
 
-      if (consensus.isAura) {
-        slot = consensus.asAura[0];
+      if (preRuntime.engine.isAura) {
+        slot = preRuntime.slot;
       }
     } else {
-      item = header.digest.logs.find((log) => log.isSealV0);
+      const [citem] = header.digest.logsWith('Consensus');
 
-      // extract author from the seal (pre substrate 1.0, backwards compat)
-      if (item) {
-        slot = item.asSealV0.slot;
+      // extract author from the consensus (substrate 1.0, digest)
+      if (citem) {
+        const consensus = citem.asConsensus;
+
+        if (consensus.engine.isAura) {
+          slot = consensus.slot;
+        }
+      } else {
+        const [sitem] = header.digest.logsWith('SealV0');
+
+        // extract author from the seal (pre substrate 1.0, backwards compat)
+        if (sitem) {
+          slot = sitem.asSealV0.slot;
+        }
       }
     }
 
     // found a slot? Great, extract the validator
     if (slot) {
-      this._author = sessionValidators[slot.toNumber() % sessionValidators.length];
+      this._author = sessionValidators[slot.modn(sessionValidators.length)];
     }
   }
 
diff --git a/packages/api-derive/test/e2e/promise.spec.ts b/packages/api-derive/test/e2e/promise.spec.ts
index 5c8dc87d5e..0ef46dbee8 100644
--- a/packages/api-derive/test/e2e/promise.spec.ts
+++ b/packages/api-derive/test/e2e/promise.spec.ts
@@ -10,8 +10,8 @@ import ApiPromise from '@polkadot/api/promise/Api';
 import testKeyring from '@polkadot/keyring/testing';
 import { WsProvider } from '@polkadot/rpc-provider';
 
-// const WS = 'ws://127.0.0.1:9944/';
-const WS = 'wss://poc3-rpc.polkadot.io/';
+const WS = 'ws://127.0.0.1:9944/';
+// const WS = 'wss://poc3-rpc.polkadot.io/';
 
 describe.skip('derive e2e', () => {
   let api: ApiPromise;
diff --git a/packages/types/src/rpc/Digest.spec.ts b/packages/types/src/rpc/Digest.spec.ts
index 93d964b9dc..7bc2e2c19b 100644
--- a/packages/types/src/rpc/Digest.spec.ts
+++ b/packages/types/src/rpc/Digest.spec.ts
@@ -4,7 +4,7 @@
 
 import json3 from '../json/Header.003.json';
 import json4 from '../json/Header.004.0x2e2.json';
-import Digest from './Digest';
+import Digest, { ConsensusEngineId, CID_AURA, CID_BABE, CID_GRPA } from './Digest';
 
 describe('Digest', () => {
   it('decodes logs with consensus', () => {
@@ -34,4 +34,15 @@ describe('Digest', () => {
     expect(logs.length).toEqual(1);
     expect(logs[0].type).toEqual('Seal');
   });
+
+  describe('ConsensusId', () => {
+    it('creates a valid id for aura', () => {
+      expect(ConsensusEngineId.stringToId('afg1')).toEqual(CID_GRPA);
+      expect(ConsensusEngineId.stringToId('aura')).toEqual(CID_AURA);
+    });
+
+    it('reverses an id to string for babe', () => {
+      expect(ConsensusEngineId.idToString(CID_BABE)).toEqual('babe');
+    });
+  });
 });
diff --git a/packages/types/src/rpc/Digest.ts b/packages/types/src/rpc/Digest.ts
index ff25fed514..8c620bf73d 100644
--- a/packages/types/src/rpc/Digest.ts
+++ b/packages/types/src/rpc/Digest.ts
@@ -2,7 +2,8 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import { assert } from '@polkadot/util';
+import BN from 'bn.js';
+import { assert, bnToBn } from '@polkadot/util';
 
 import Enum from '../codec/Enum';
 import Struct from '../codec/Struct';
@@ -15,6 +16,12 @@ import U64 from '../primitive/U64';
 import AuthorityId from '../type/AuthorityId';
 import Signature from '../type/Signature';
 
+const CID_AURA = 0x61727561; // 'aura'
+const CID_BABE = 0x65626162; // 'babe'
+const CID_GRPA = 0x31676661; // 'afg1'
+
+export { CID_AURA, CID_BABE, CID_GRPA };
+
 /**
  * @name AuthoritiesChange
  * @description
@@ -37,6 +44,59 @@ export class ChangesTrieRoot extends Hash {
  * A 4-byte identifier (actually a [u8; 4]) identifying the engine, e.g. for Aura it would be [b'a', b'u', b'r', b'a']
  */
 export class ConsensusEngineId extends U32 {
+  static idToString (input: number | BN): string {
+    return bnToBn(input)
+      .toArray('le')
+      .map((code) => String.fromCharCode(code))
+      .join('');
+  }
+
+  static stringToId (input: string): number {
+    return input
+      .split('')
+      .reverse()
+      .reduce((result, char) => (result * 256) + char.charCodeAt(0), 0);
+  }
+
+  /**
+   * @description `true` if the engine matches aura
+   */
+  get isAura (): boolean {
+    return this.eq(CID_AURA);
+  }
+
+  /**
+   * @description `true` is the engine matches babe
+   */
+  get isBabe (): boolean {
+    return this.eq(CID_BABE);
+  }
+
+  /**
+   * @description `true` is the engine matches grandpa
+   */
+  get isGrandpa (): boolean {
+    return this.eq(CID_GRPA);
+  }
+
+  /**
+   * @description From the input bytes, decode into an aura-tuple
+   */
+  extractSlot (bytes: Bytes): U64 {
+    assert(this.isAura, 'Invalid engine for asAura conversion');
+
+    return new U64(
+      // no compact prefix, only use the correct number of supplied bytes
+      bytes.toU8a(true).subarray(0, 8)
+    );
+  }
+
+  /**
+   * @description Override the default toString to return a 4-byte string
+   */
+  toString (): string {
+    return ConsensusEngineId.idToString(this);
+  }
 }
 
 /**
@@ -52,13 +112,6 @@ export class Consensus extends Tuple {
     }, value);
   }
 
-  /**
-   * @description `true` if the engine matches aura
-   */
-  get isAura (): boolean {
-    return this.engine.eq(0x61727561); // ['a', 'u', 'r', 'a']
-  }
-
   /**
    * @description The wrapped engine [[ConsensusEngineId]]
    */
@@ -74,17 +127,10 @@ export class Consensus extends Tuple {
   }
 
   /**
-   * @description The slot and signature extracted from the raw data (assuming Aura)
+   * @description The slot extracted from the raw data (fails on non-Aura)
    */
-  get asAura (): [U64, Signature] {
-    assert(this.isAura, 'Invalid engine for asAura conversion');
-
-    const raw = this.data.toU8a(true);
-
-    return [
-      new U64(raw.subarray(0, 4)),
-      new Signature(raw.subarray(64))
-    ];
+  get slot (): U64 {
+    return this.engine.extractSlot(this.data);
   }
 }
 
@@ -178,8 +224,29 @@ export class PreRuntime extends Tuple {
   get data (): Bytes {
     return this[1] as Bytes;
   }
+
+  /**
+   * @description The slot extracted from the raw data (fails on non-Aura)
+   */
+  get slot (): U64 {
+    return this.engine.extractSlot(this.data);
+  }
 }
 
+// Note the ordering, it aligns with numbers to the Rust implementation
+// (current and previous versions are included hjere, e.g. SealV0)
+const DigestItemEnumMap = {
+  Other, // 0
+  AuthoritiesChange, // 1
+  ChangesTrieRoot, // 2
+  SealV0, // 3
+  Consensus, // 4
+  Seal, // 5
+  PreRuntime // 6
+};
+
+type DigestItemTypes = keyof typeof DigestItemEnumMap;
+
 /**
  * @name DigestItem
  * @description
@@ -187,17 +254,7 @@ export class PreRuntime extends Tuple {
  */
 export class DigestItem extends Enum {
   constructor (value: any) {
-    // Note the ordering, it aligns with numbers to the Rust implementation
-    // (current and previous versions)
-    super({
-      Other, // 0
-      AuthoritiesChange, // 1
-      ChangesTrieRoot, // 2
-      SealV0, // 3
-      Consensus, // 4
-      Seal, // 5
-      PreRuntime // 6
-    }, value);
+    super(DigestItemEnumMap, value);
   }
 
   /**
@@ -318,6 +375,13 @@ export class DigestItem extends Enum {
   toJSON (): any {
     return this.toHex();
   }
+
+  /**
+   * @description Returns the type of engine, we just override here to get the typings correct
+   */
+  get type (): DigestItemTypes {
+    return super.type as DigestItemTypes;
+  }
 }
 
 /**
@@ -342,14 +406,14 @@ export default class Digest extends Struct {
   /**
    * @description The [[DigestItem]] logs, filtered, filter items included. This is useful for derive functionality where only a certain type of log is to be returned.
    */
-  logsWith (...include: Array<string>): Vector<DigestItem> {
+  logsWith (...include: Array<DigestItemTypes>): Vector<DigestItem> {
     return this.logs.filter(({ type }) => include.includes(type)) as Vector<DigestItem>;
   }
 
   /**
    * @description The [[DigestItem]] logs, filtered, filter items exluded. This is useful for stripping headers for eg. WASM runtime execution.
    */
-  logsWithout (...exclude: Array<string>): Vector<DigestItem> {
+  logsWithout (...exclude: Array<DigestItemTypes>): Vector<DigestItem> {
     return this.logs.filter(({ type }) => !exclude.includes(type)) as Vector<DigestItem>;
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 9de4e1091a..f1d61716d1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1683,10 +1683,10 @@
     universal-user-agent "^2.0.0"
     url-template "^2.0.8"
 
-"@polkadot/dev@^0.30.0-beta.8":
-  version "0.30.0-beta.8"
-  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.30.0-beta.8.tgz#a70027e9e35eb63ba309abb06f6d68f703a64e4b"
-  integrity sha512-NPO94R9b9z7CIyZiXOedDPvNCuaJo0+MtKuA6wYWS2s+Lq3DCccfKFPm4/vxQhTGJzmXDKkMyvporo5gPHNC5g==
+"@polkadot/dev@^0.30.0-beta.10":
+  version "0.30.0-beta.10"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.30.0-beta.10.tgz#90346cf06a4fcdcac985d4bf7ecf707dbbd84f1d"
+  integrity sha512-ynX4DyFZME2BiDcYltewPIUpegHhhgHxC+qJSAXTkappB+3/ItFBH2T9hFWTHo3/d+DenSRBfXf0HjEdEWYQgQ==
   dependencies:
     "@babel/cli" "^7.4.4"
     "@babel/core" "^7.4.5"
@@ -1718,7 +1718,7 @@
     typedoc-plugin-markdown "^1.2.1"
     typedoc-plugin-no-inherit "^1.1.8"
     typescript "^3.5.1"
-    vuepress "^1.0.0-alpha.47"
+    vuepress "^1.0.0-beta.2"
 
 "@polkadot/keyring@^0.92.1":
   version "0.92.1"
@@ -1731,10 +1731,12 @@
     "@types/bs58" "^4.0.0"
     bs58 "^4.0.1"
 
-"@polkadot/ts@^0.1.58":
-  version "0.1.58"
-  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.1.58.tgz#bd8883d590fc5be27e1db75c5c629e6bc8c4ce5c"
-  integrity sha512-+veSrr59SefA43RX034eef1T8qhO15Ye0BQ1+3FxjuFBnlCVmzj6iKGuzCtp4kGp3uFeotQ3m/2xMA+akSwq4Q==
+"@polkadot/ts@^0.1.59":
+  version "0.1.59"
+  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.1.59.tgz#e7418db78ad50291a46d61a3ab34ab465c0c3bf0"
+  integrity sha512-+kiST4RjeuyMWu2HdqIA6Ph2AifjGvlQ5bLDe9mfuApH07h8fgtzu+xVE4FZvMkLtjyKD+FSbB/oVplq2R1WEw==
+  dependencies:
+    "@types/chrome" "^0.0.86"
 
 "@polkadot/util-crypto@^0.92.1":
   version "0.92.1"
@@ -1835,6 +1837,13 @@
   dependencies:
     "@types/base-x" "*"
 
+"@types/chrome@^0.0.86":
+  version "0.0.86"
+  resolved "https://registry.yarnpkg.com/@types/chrome/-/chrome-0.0.86.tgz#1026ef8e76db4fde1859cae858d73236fe670d69"
+  integrity sha512-7ehebPf/5IR64SYdD2Vig0q0oUCNbWMQ29kASlNJaHVVtA5/J/DnrxnYVPCID70o7LgHdYsav6I4/XdqAxjTLQ==
+  dependencies:
+    "@types/filesystem" "*"
+
 "@types/deasync@^0.1.0":
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/@types/deasync/-/deasync-0.1.0.tgz#b2bd6c3fcde3cf67b8be4c2f70136ba8f157b45a"
@@ -1845,6 +1854,18 @@
   resolved "https://registry.yarnpkg.com/@types/events/-/events-3.0.0.tgz#2862f3f58a9a7f7c3e78d79f130dd4d71c25c2a7"
   integrity sha512-EaObqwIvayI5a8dCzhFrjKzVwKLxjoG9T6Ppd5CEo07LRKfQ8Yokw54r5+Wq7FaBQ+yXRvQAYPrHwya1/UFt9g==
 
+"@types/filesystem@*":
+  version "0.0.29"
+  resolved "https://registry.yarnpkg.com/@types/filesystem/-/filesystem-0.0.29.tgz#ee3748eb5be140dcf980c3bd35f11aec5f7a3748"
+  integrity sha512-85/1KfRedmfPGsbK8YzeaQUyV1FQAvMPMTuWFQ5EkLd2w7szhNO96bk3Rh/SKmOfd9co2rCLf0Voy4o7ECBOvw==
+  dependencies:
+    "@types/filewriter" "*"
+
+"@types/filewriter@*":
+  version "0.0.28"
+  resolved "https://registry.yarnpkg.com/@types/filewriter/-/filewriter-0.0.28.tgz#c054e8af4d9dd75db4e63abc76f885168714d4b3"
+  integrity sha1-wFTor02d11205jq8dviFFocU1LM=
+
 "@types/fs-extra@^5.0.3":
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/@types/fs-extra/-/fs-extra-5.1.0.tgz#2a325ef97901504a3828718c390d34b8426a10a1"
@@ -2180,18 +2201,18 @@
     source-map "~0.6.1"
     vue-template-es2015-compiler "^1.9.0"
 
-"@vuepress/core@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/core/-/core-1.0.0-alpha.48.tgz#1015318396e29a7690a21f4dada43f7957fea6f0"
-  integrity sha512-vGYudGsRNtA9ErKOQFSv9OzUGFG4R/ypemruT99bHqdVJ89bmJyil5hOF5tesT9kPrQV+lM9QPl4yH5Q7KOYmQ==
+"@vuepress/core@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/core/-/core-1.0.0-beta.2.tgz#587b02ab23c1a45239477f7e38151dc8bee314fb"
+  integrity sha512-gJGOcZPCMkFLzM+jwuBC3SXGU1tqYdausjAS5d0oddAYogJWOJgDugY8f0bjRM2+LmpF445vPpOQjReWv+v2KA==
   dependencies:
     "@babel/core" "^7.0.0"
     "@vue/babel-preset-app" "^3.1.1"
-    "@vuepress/markdown" "^1.0.0-alpha.48"
-    "@vuepress/markdown-loader" "^1.0.0-alpha.48"
-    "@vuepress/plugin-last-updated" "^1.0.0-alpha.48"
-    "@vuepress/plugin-register-components" "^1.0.0-alpha.48"
-    "@vuepress/shared-utils" "^1.0.0-alpha.48"
+    "@vuepress/markdown" "^1.0.0-beta.2"
+    "@vuepress/markdown-loader" "^1.0.0-beta.2"
+    "@vuepress/plugin-last-updated" "^1.0.0-beta.2"
+    "@vuepress/plugin-register-components" "^1.0.0-beta.2"
+    "@vuepress/shared-utils" "^1.0.0-beta.2"
     autoprefixer "^9.5.1"
     babel-loader "^8.0.4"
     cache-loader "^3.0.0"
@@ -2219,25 +2240,25 @@
     vuepress-plugin-container "^2.0.0"
     webpack "^4.8.1"
     webpack-chain "^4.6.0"
-    webpack-dev-server "^3.1.14"
+    webpack-dev-server "^3.5.1"
     webpack-merge "^4.1.2"
     webpackbar "3.2.0"
 
-"@vuepress/markdown-loader@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/markdown-loader/-/markdown-loader-1.0.0-alpha.48.tgz#21861f51586b20e7d6da6c8ca09417ddc92b5237"
-  integrity sha512-wIwB6pAgwz1Z5b+YKLZqTTq24bT4SQ1Q5CLC1za8Tv710kciYKET+ltqZSExQ9+ZnTzaGFJX2hvCFbJA4dKMvw==
+"@vuepress/markdown-loader@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/markdown-loader/-/markdown-loader-1.0.0-beta.2.tgz#6a28a39cbd725cb74405b378261a2c3d5c5b0edb"
+  integrity sha512-O0LEql5DHPcnSmnpymcLTv1NlR+RREEYpfo6g7C6GSfJl1phGR78srF+4j7AklWJgZxpDXHmvnQpsTWs9TpUQA==
   dependencies:
-    "@vuepress/markdown" "^1.0.0-alpha.48"
+    "@vuepress/markdown" "^1.0.0-beta.2"
     loader-utils "^1.1.0"
     lru-cache "^5.1.1"
 
-"@vuepress/markdown@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/markdown/-/markdown-1.0.0-alpha.48.tgz#b049fcd52aaa18896dce95cea71c0d9ac4bd6b8d"
-  integrity sha512-OT+mAjTp1BwlZhRd316VHN6dSoNPkBkWaCfuKDlVzOu5/HfoMpG1P8OJzhRpZO0w0I52HXe0nL0GFHybwOBxaA==
+"@vuepress/markdown@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/markdown/-/markdown-1.0.0-beta.2.tgz#a78ccd9c13f876c2aee3d317baf431f4f396d2e2"
+  integrity sha512-bNNmPvuNtTLpywMGHlpy72I5Bw5sXnSToKJjGtCHI08+72Pn/KuHDnWcmWLIEGiZba8jmg6L9byo5u7njVncjA==
   dependencies:
-    "@vuepress/shared-utils" "^1.0.0-alpha.48"
+    "@vuepress/shared-utils" "^1.0.0-beta.2"
     markdown-it "^8.4.1"
     markdown-it-anchor "^5.0.2"
     markdown-it-chain "^1.3.0"
@@ -2245,43 +2266,43 @@
     markdown-it-table-of-contents "^0.4.0"
     prismjs "^1.13.0"
 
-"@vuepress/plugin-active-header-links@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-active-header-links/-/plugin-active-header-links-1.0.0-alpha.48.tgz#f30772d4a83f12ade91019a62ac5ce3864f19d2c"
-  integrity sha512-wgSxa45JhY/Lkt2YJPPmmqH4dDFBtw0A3mhpUL78mvBi77MM7lkB4dFxZ0PTOoc4zKuOqB0gLhtwclcjG3haVw==
+"@vuepress/plugin-active-header-links@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-active-header-links/-/plugin-active-header-links-1.0.0-beta.2.tgz#607d6aca029df009a9572a14bc5b1544a8e5c21f"
+  integrity sha512-4fDbOBqtuzKyr7Pj8/K3SixjMwJykJOp9XMqAa2wNQbRnYIRZwj+pHghZgyB4rw6eCQTcXk4OJklOnb6TljvfA==
   dependencies:
     lodash.throttle "^4.1.1"
 
-"@vuepress/plugin-last-updated@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-last-updated/-/plugin-last-updated-1.0.0-alpha.48.tgz#dd9f5fdb2f4994f71bd47ae4dd4ca4885d346347"
-  integrity sha512-qJFEov3ff789Z+ZQeJ7mX++QYDykhfktq8jCum6ilrJhV5ni1TMvhYYCGlcDu3Z86VGmt0O4TmAUf9JYzV9wXQ==
+"@vuepress/plugin-last-updated@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-last-updated/-/plugin-last-updated-1.0.0-beta.2.tgz#eff76a30cbf98190814d23aecef9c8ca408cd1de"
+  integrity sha512-7P13jy7g4LC9AGhwG1AXY6CZiRfr7nvLkiQGKHXo4KHejpoyv0c1kYwWINi9GWoCgDMeQeCiFiWursaAUybRGw==
   dependencies:
     cross-spawn "^6.0.5"
 
-"@vuepress/plugin-nprogress@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-nprogress/-/plugin-nprogress-1.0.0-alpha.48.tgz#b0f8459d518b8f8b1fdd58b9e8e3aa195bb94604"
-  integrity sha512-18F1TToseOpukH8auniVI5rW1i8pUw6hCFj7RurUM2whgt9y4rF8qDVuZeBAhs3/cTmdvxZwpP+W1GyL+EXMiw==
+"@vuepress/plugin-nprogress@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-nprogress/-/plugin-nprogress-1.0.0-beta.2.tgz#2a18b8a1e6323ee2166420f629023dbec5fe1b5b"
+  integrity sha512-1DX+4R0iwtpwDbXpT+FGZ1FfAnaWXLLvuryYuGQQXpWgkMduppbprGtsQLXcEUbmzfQteOpIwVbmxZOQ8a5jiQ==
   dependencies:
     nprogress "^0.2.0"
 
-"@vuepress/plugin-register-components@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-register-components/-/plugin-register-components-1.0.0-alpha.48.tgz#790a9d3dff8dce6691cac82d5778efa7ac8ca8bb"
-  integrity sha512-4FwiIdKQ4ZQtWnawxI597ezJr6iIRW8NRbHLZUV0dAIac4W6ktABV/wlBp9bhCL9jZBtnnn2OsMIrVePmamrUg==
+"@vuepress/plugin-register-components@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-register-components/-/plugin-register-components-1.0.0-beta.2.tgz#e8df9c74775465b1a41de9ba270497e7411a24de"
+  integrity sha512-f5L75EkTDaM0KR8Rj+iSrwDHZM6873psHiABB6rupUra+HZ3cQLKm9iQ40Lg/8y/rE0vx0CGRHen2x60FdccQg==
   dependencies:
-    "@vuepress/shared-utils" "^1.0.0-alpha.48"
+    "@vuepress/shared-utils" "^1.0.0-beta.2"
 
-"@vuepress/plugin-search@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-search/-/plugin-search-1.0.0-alpha.48.tgz#d373de4cb0f86a28cc83a026e19189de0b9e6461"
-  integrity sha512-pgaY4RPTbF/1vxLg2iZoHtzQZmybMvhDfmQcca1fOZp52cm23ZB+1uQaHYMVUAwbQJoaoGssUh4aQDaAT/GI5g==
+"@vuepress/plugin-search@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-search/-/plugin-search-1.0.0-beta.2.tgz#6689234ba68da00845cbcc4512e1bf2d31916b11"
+  integrity sha512-l39ANikYzl5lvuLmCEy5UBrPZ1DtzitNCdf+O9lGvSUdRibL4fYclo6DIpRnyeIt4MYDRxVJ0C02Qv/9hD57Cw==
 
-"@vuepress/shared-utils@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/shared-utils/-/shared-utils-1.0.0-alpha.48.tgz#c00edb82c58c2079be65149d917b8a4048041f60"
-  integrity sha512-nu30m2u9tNa5Owk24KOL/rf3kOgRxRYhksEWiAjtDsBynYB/6AkEt2ZGCu27kMgNxPCNc8XVm/6XNSRfGvbt7g==
+"@vuepress/shared-utils@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/shared-utils/-/shared-utils-1.0.0-beta.2.tgz#9b14c2d62292c83250e0ca3619ef536a0bb4c034"
+  integrity sha512-1vxGXLrii1jb4nDH+cH8QYxC3kRJ7zTTkiVh6cPpLW5EjHUK4p6muSXJXZtrJU2dDcyRUS0VWtzoursHThwGqw==
   dependencies:
     chalk "^2.3.2"
     diacritics "^1.3.0"
@@ -2293,14 +2314,14 @@
     semver "^6.0.0"
     upath "^1.1.0"
 
-"@vuepress/theme-default@^1.0.0-alpha.48":
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/@vuepress/theme-default/-/theme-default-1.0.0-alpha.48.tgz#6b140293422e97a2a53d69e610017c4f6cd3ab9a"
-  integrity sha512-FdC/2pOI46qT28EJ4zIlLD2EvltBX/Y6HZDoZvF+NxGi0kJX7s17/+z2yb+sVh5pQukp5avxCSwnAPoN4ZFRfw==
+"@vuepress/theme-default@^1.0.0-beta.2":
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/@vuepress/theme-default/-/theme-default-1.0.0-beta.2.tgz#de778d90740363eb9ba52174c930c4f385dec6ae"
+  integrity sha512-Zit7yUDGl4cLhm/SxDW5Z11czJUrh9m70+BXyncn8GFlPfm7KTLEJkPeXNfelHfCMr0pyJ1aPxWG1tu/fAeTKQ==
   dependencies:
-    "@vuepress/plugin-active-header-links" "^1.0.0-alpha.48"
-    "@vuepress/plugin-nprogress" "^1.0.0-alpha.48"
-    "@vuepress/plugin-search" "^1.0.0-alpha.48"
+    "@vuepress/plugin-active-header-links" "^1.0.0-beta.2"
+    "@vuepress/plugin-nprogress" "^1.0.0-beta.2"
+    "@vuepress/plugin-search" "^1.0.0-beta.2"
     docsearch.js "^2.5.2"
     stylus "^0.54.5"
     stylus-loader "^3.0.2"
@@ -5079,7 +5100,7 @@ expect@^24.8.0:
     jest-message-util "^24.8.0"
     jest-regex-util "^24.3.0"
 
-express@^4.17.0:
+express@^4.17.1:
   version "4.17.1"
   resolved "https://registry.yarnpkg.com/express/-/express-4.17.1.tgz#4491fc38605cf51f8629d39c2b5d026f98a4c134"
   integrity sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==
@@ -7493,7 +7514,7 @@ log-driver@^1.2.7:
   resolved "https://registry.yarnpkg.com/log-driver/-/log-driver-1.2.7.tgz#63b95021f0702fedfa2c9bb0a24e7797d71871d8"
   integrity sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==
 
-loglevel@^1.6.1:
+loglevel@^1.6.2:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/loglevel/-/loglevel-1.6.2.tgz#668c77948a03dbd22502a3513ace1f62a80cc372"
   integrity sha512-Jt2MHrCNdtIe1W6co3tF5KXGRkzF+TYffiQstfXa04mrss9IKXzAAXYWak8LbZseAQY03sH2GzMCMU0ZOUc9bg==
@@ -10193,7 +10214,7 @@ selfsigned@^1.10.4:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.0.tgz#790a7cf6fea5459bac96110b29b60412dc8ff96b"
   integrity sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==
 
-semver@^6.0.0, semver@^6.1.0:
+semver@^6.0.0, semver@^6.1.0, semver@^6.1.1:
   version "6.1.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.1.1.tgz#53f53da9b30b2103cd4f15eab3a18ecbcb210c9b"
   integrity sha512-rWYq2e5iYW+fFe/oPPtYJxYgjBm8sC4rmoGdUOgBB7VnwKt6HrL793l2voH1UlsyYZpJ4g0wfjnTEO1s1NP2eQ==
@@ -11652,13 +11673,13 @@ vuepress-plugin-container@^2.0.0:
   dependencies:
     markdown-it-container "^2.0.0"
 
-vuepress@^1.0.0-alpha.47:
-  version "1.0.0-alpha.48"
-  resolved "https://registry.yarnpkg.com/vuepress/-/vuepress-1.0.0-alpha.48.tgz#485b908c246297d4210999d7a010105447a6c3f0"
-  integrity sha512-rvEh4xS1Jp7/dC1YsT0VRmn+cP2BLn4KXSKKt9LFnUPgDwi80zARaSIN0NrpaADPQqKb2OxUY1fNV9ectzZ+QA==
+vuepress@^1.0.0-beta.2:
+  version "1.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/vuepress/-/vuepress-1.0.0-beta.2.tgz#3cc6f5de8ebfbeb5d60296903b9f1eaf10628f1f"
+  integrity sha512-U0qoLY3kfvow1kvpev8OndqXNDRg0g0YrwSA99BUa6Raf0RBxWQySD1U26klZiRS5AACi9wyvdC1hqKjUsQcBg==
   dependencies:
-    "@vuepress/core" "^1.0.0-alpha.48"
-    "@vuepress/theme-default" "^1.0.0-alpha.48"
+    "@vuepress/core" "^1.0.0-beta.2"
+    "@vuepress/theme-default" "^1.0.0-beta.2"
     cac "^6.3.9"
     envinfo "^7.2.0"
 
@@ -11722,10 +11743,10 @@ webpack-dev-middleware@^3.7.0:
     range-parser "^1.2.1"
     webpack-log "^2.0.0"
 
-webpack-dev-server@^3.1.14:
-  version "3.4.1"
-  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.4.1.tgz#a5fd8dec95dec410098e7d9a037ff9405395d51a"
-  integrity sha512-CRqZQX2ryMtrg0r3TXQPpNh76eM1HD3Wmu6zDBxIKi/d2y+4aa28Ia8weNT0bfgWpY6Vs3Oq/K8+DjfbR+tWYw==
+webpack-dev-server@^3.5.1:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.6.0.tgz#7f675f69bf0999e5f489d1e2532182cfdf55706c"
+  integrity sha512-49CWhocbMzjNW2Dzo3ETnxtzifcKGx4Pa3Hx+sl0hBU5/t7zJTkOvMP1sCnu9/qGNDYW1PKCuszYQn5r2g5Sww==
   dependencies:
     ansi-html "0.0.7"
     bonjour "^3.5.0"
@@ -11734,19 +11755,19 @@ webpack-dev-server@^3.1.14:
     connect-history-api-fallback "^1.6.0"
     debug "^4.1.1"
     del "^4.1.1"
-    express "^4.17.0"
+    express "^4.17.1"
     html-entities "^1.2.1"
     http-proxy-middleware "^0.19.1"
     import-local "^2.0.0"
     internal-ip "^4.3.0"
     ip "^1.1.5"
     killable "^1.0.1"
-    loglevel "^1.6.1"
+    loglevel "^1.6.2"
     opn "^5.5.0"
     portfinder "^1.0.20"
     schema-utils "^1.0.0"
     selfsigned "^1.10.4"
-    semver "^6.0.0"
+    semver "^6.1.1"
     serve-index "^1.9.1"
     sockjs "0.3.19"
     sockjs-client "1.3.0"