diff --git a/packages/ui-settings/src/Settings.ts b/packages/ui-settings/src/Settings.ts
index 820e5062..3da46612 100644
--- a/packages/ui-settings/src/Settings.ts
+++ b/packages/ui-settings/src/Settings.ts
@@ -4,12 +4,13 @@
 
 import store from 'store';
 
-import { CRYPTOS, ENDPOINT_DEFAULT, ENDPOINTS, LANGUAGE_DEFAULT, LANGUAGES, UIMODE_DEFAULT, UIMODES, UITHEME_DEFAULT, UITHEMES } from './defaults';
+import { CRYPTOS, ENDPOINT_DEFAULT, ENDPOINTS, LANGUAGE_DEFAULT, LANGUAGES, LOCKING_DEFAULT, LOCKING, UIMODE_DEFAULT, UIMODES, UITHEME_DEFAULT, UITHEMES } from './defaults';
 import { Options, SettingsStruct } from './types';
 
 export class Settings implements SettingsStruct {
   private _apiUrl: string;
   private _i18nLang: string;
+  private _locking: string;
   private _uiMode: string;
   private _uiTheme: string;
 
@@ -18,6 +19,7 @@ export class Settings implements SettingsStruct {
 
     this._apiUrl = settings.apiUrl || process.env.WS_URL || ENDPOINT_DEFAULT;
     this._i18nLang = settings.i18nLang || LANGUAGE_DEFAULT;
+    this._locking = settings.locking || LOCKING_DEFAULT;
     this._uiMode = settings.uiMode || UIMODE_DEFAULT;
     this._uiTheme = settings.uiTheme || UITHEME_DEFAULT;
   }
@@ -30,6 +32,10 @@ export class Settings implements SettingsStruct {
     return this._i18nLang;
   }
 
+  get locking (): string {
+    return this._locking;
+  }
+
   get uiMode (): string {
     return this._uiMode;
   }
@@ -50,6 +56,10 @@ export class Settings implements SettingsStruct {
     return LANGUAGES;
   }
 
+  get availableLocking (): Options {
+    return LOCKING;
+  }
+
   get availableUIModes (): Options {
     return UIMODES;
   }
@@ -62,6 +72,7 @@ export class Settings implements SettingsStruct {
     return {
       apiUrl: this._apiUrl,
       i18nLang: this._i18nLang,
+      locking: this._locking,
       uiMode: this._uiMode,
       uiTheme: this._uiTheme
     };
@@ -70,6 +81,7 @@ export class Settings implements SettingsStruct {
   set (settings: Partial<SettingsStruct>): void {
     this._apiUrl = settings.apiUrl || this._apiUrl;
     this._i18nLang = settings.i18nLang || this._i18nLang;
+    this._locking = settings.locking || this._locking;
     this._uiMode = settings.uiMode || this._uiMode;
     this._uiTheme = settings.uiTheme || this._uiTheme;
 
diff --git a/packages/ui-settings/src/defaults.ts b/packages/ui-settings/src/defaults.ts
index 71b5014a..7d4ace24 100644
--- a/packages/ui-settings/src/defaults.ts
+++ b/packages/ui-settings/src/defaults.ts
@@ -4,13 +4,14 @@
 
 import { Options } from './types';
 
-// matches https://polkadot.js.org & https://poc-3.polkadot.io
- // tslint:disable-next-line
+// matches https://polkadot.js.org & https://*.polkadot.io
+// tslint:disable-next-line
 const isPolkadot = typeof window !== 'undefined' && window.location.host.indexOf('polkadot') !== -1;
 
 const WSS_POLKADOT = 'wss://poc3-rpc.polkadot.io/';
 const WSS_SUBSTRATE = 'wss://substrate-rpc.parity.io/';
 const LANGUAGE_DEFAULT = 'default';
+const LOCKING_DEFAULT = 'session';
 
 const CRYPTOS: Options = [
   { text: 'Edwards (ed25519)', value: 'ed25519' },
@@ -24,7 +25,12 @@ const ENDPOINTS: Options = [
 ];
 
 const LANGUAGES: Options = [
-  { value: LANGUAGE_DEFAULT, text: 'Default browser language (auto-detect)' }
+  { text: 'Default browser language (auto-detect)', value: LANGUAGE_DEFAULT }
+];
+
+const LOCKING: Options = [
+  { text: 'Once per session', value: 'session' },
+  { text: 'On each transaction', value: 'tx' }
 ];
 
 const UIMODES: Options = [
@@ -56,6 +62,8 @@ export {
   ENDPOINTS,
   LANGUAGE_DEFAULT,
   LANGUAGES,
+  LOCKING_DEFAULT,
+  LOCKING,
   UIMODE_DEFAULT,
   UIMODES,
   UITHEME_DEFAULT,
diff --git a/packages/ui-settings/src/types.ts b/packages/ui-settings/src/types.ts
index 077a623a..b4901fee 100644
--- a/packages/ui-settings/src/types.ts
+++ b/packages/ui-settings/src/types.ts
@@ -11,6 +11,7 @@ export type Options = Array<{
 export interface SettingsStruct {
   apiUrl: string;
   i18nLang: string;
+  locking: string;
   uiMode: string;
   uiTheme: string;
 }