diff --git a/package.json b/package.json
index c6afc9edaa..bc236f318d 100644
--- a/package.json
+++ b/package.json
@@ -32,8 +32,8 @@
     "@babel/core": "^7.5.5",
     "@babel/register": "^7.5.5",
     "@babel/runtime": "^7.5.5",
-    "@polkadot/dev": "^0.31.0-beta.2",
+    "@polkadot/dev": "^0.31.0-beta.3",
     "@polkadot/ts": "^0.1.64",
-    "gh-pages": "2.0.1"
+    "gh-pages": "^2.1.1"
   }
 }
diff --git a/packages/api-derive/src/type/HeaderExtended.ts b/packages/api-derive/src/type/HeaderExtended.ts
index 34cf9a4f12..0d33914e45 100644
--- a/packages/api-derive/src/type/HeaderExtended.ts
+++ b/packages/api-derive/src/type/HeaderExtended.ts
@@ -8,7 +8,7 @@ import { AnyJsonObject, Constructor } from '@polkadot/types/types';
 import runtimeTypes from '@polkadot/types/interfaces/runtime/definitions';
 import { Struct } from '@polkadot/types';
 
-// @ts-ignore
+// @ts-ignore We can ignore the properties, added via Struct.with
 const _Header: Constructor<Header> = Struct.with(runtimeTypes.types.Header);
 
 /**
diff --git a/packages/api-derive/src/type/ReferendumInfoExtended.ts b/packages/api-derive/src/type/ReferendumInfoExtended.ts
index 9442f76fa5..2815ddc2a4 100644
--- a/packages/api-derive/src/type/ReferendumInfoExtended.ts
+++ b/packages/api-derive/src/type/ReferendumInfoExtended.ts
@@ -9,7 +9,7 @@ import BN from 'bn.js';
 import democracyTypes from '@polkadot/types/interfaces/democracy/definitions';
 import { Struct, createType } from '@polkadot/types';
 
-// @ts-ignore
+// @ts-ignore We can ignore the properties, added via Struct.with
 const _ReferendumInfo: Constructor<ReferendumInfo> = Struct.with(democracyTypes.types.ReferendumInfo);
 
 /**
diff --git a/packages/api/src/SignerPayload.ts b/packages/api/src/SignerPayload.ts
index f97dfaa2a1..c66392bda6 100644
--- a/packages/api/src/SignerPayload.ts
+++ b/packages/api/src/SignerPayload.ts
@@ -3,6 +3,7 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import { Address, Balance, BlockNumber, Call, ExtrinsicEra, Hash, Index } from '@polkadot/types/interfaces';
+import { Constructor } from '@polkadot/types/types';
 import { SignerPayload, SignerPayloadRaw } from './types';
 
 import { createType, Compact, Struct, u8 } from '@polkadot/types';
@@ -19,7 +20,9 @@ export interface SignerPayloadType {
   version: u8;
 }
 
-export default class Payload extends Struct.with({
+// We explicitly cast the type here to get the actual TypeScript exports right
+// @ts-ignore We can ignore the properties, added via Struct.with
+const _Payload: Constructor<SignerPayloadType> = Struct.with({
   address: 'Address',
   blockHash: 'Hash',
   blockNumber: 'BlockNumber',
@@ -29,7 +32,9 @@ export default class Payload extends Struct.with({
   nonce: 'Compact<Index>',
   tip: 'Compact<Balance>',
   version: u8
-}) {
+});
+
+export default class Payload extends _Payload {
   /**
    * @description Returns this as a SignerPayloadType. This works since the Struct.with injects all the getters automatically (just ensure the 2 definitiona are matching)
    */
diff --git a/yarn.lock b/yarn.lock
index 533472df36..d9b76291f6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1795,10 +1795,10 @@
     universal-user-agent "^3.0.0"
     url-template "^2.0.8"
 
-"@polkadot/dev@^0.31.0-beta.2":
-  version "0.31.0-beta.2"
-  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.31.0-beta.2.tgz#28d1e10cc40267db2dc7854916feeb0613c22609"
-  integrity sha512-jtexumNVyfcbIPCbuwYF77DE54it/CeKdg9HClyjig3Iw26Np0uHIrfDCxmINLwrckkuvka66hs64sj7u3QqXw==
+"@polkadot/dev@^0.31.0-beta.3":
+  version "0.31.0-beta.3"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.31.0-beta.3.tgz#f9880e7c430e6a4df423211244a1dddb509c3eca"
+  integrity sha512-6VTgIR4EBvowVmaJorDmHbCctlUa+gTTL5etlU+T+yaVEA1vAS3gaSwlhgQY1baEjc9PNKHkfHun6MO/gqq+RA==
   dependencies:
     "@babel/cli" "^7.5.5"
     "@babel/core" "^7.5.5"
@@ -6123,10 +6123,10 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
-gh-pages@2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/gh-pages/-/gh-pages-2.0.1.tgz#aefe47a43b8d9d2aa3130576b33fe95641e29a2f"
-  integrity sha512-uFlk3bukljeiWKQ2XvPfjcSi/ou7IfoDf2p+Fj672saLAr8bnOdFVqI/JSgrSgInKpCg5BksxEwGUl++dbg8Dg==
+gh-pages@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/gh-pages/-/gh-pages-2.1.1.tgz#5be70a92f9cb70404bafabd8bb149c0e9a8c264b"
+  integrity sha512-yNW2SFp9xGRP/8Sk2WXuLI/Gn92oOL4HBgudn6PsqAnuWT90Y1tozJoTfX1WdrDSW5Rb90kLVOf5mm9KJ/2fDw==
   dependencies:
     async "^2.6.1"
     commander "^2.18.0"