diff --git a/packages/app-staking/src/StakeList/Account.tsx b/packages/app-staking/src/StakeList/Account.tsx
index 57fb9abf20..9e907dda7d 100644
--- a/packages/app-staking/src/StakeList/Account.tsx
+++ b/packages/app-staking/src/StakeList/Account.tsx
@@ -33,22 +33,22 @@ type Props = ApiProps & I18nProps & {
 
 type State = {
   isNominateOpen: boolean,
-  isNominating: boolean,
-  isPrefsOpen: boolean
+  isPrefsOpen: boolean,
+  nominee: AccountId | null
 };
 
 class Account extends React.PureComponent<Props, State> {
   state: State = {
     isNominateOpen: false,
-    isNominating: false,
-    isPrefsOpen: false
+    isPrefsOpen: false,
+    nominee: null
   };
 
-  static getDerivedStateFromProps ({ staking_nominating }: Props) {
-    const isNominating = !!staking_nominating && !staking_nominating.isEmpty;
-
+  static getDerivedStateFromProps ({ staking_nominating }: Props): Partial<State> {
     return {
-      isNominating
+      nominee: staking_nominating
+        ? staking_nominating.unwrapOr(null)
+        : null
     };
   }
 
@@ -76,19 +76,17 @@ class Account extends React.PureComponent<Props, State> {
   }
 
   private renderNominee () {
-    const { staking_nominating, balanceArray } = this.props;
-    const { isNominating } = this.state;
+    const { balanceArray } = this.props;
+    const { nominee } = this.state;
 
-    if (!isNominating || !staking_nominating || staking_nominating.isNone) {
+    if (!nominee) {
       return null;
     }
 
-    const nominating = staking_nominating.unwrap();
-
     return (
       <AddressMini
-        balance={balanceArray(nominating)}
-        value={nominating}
+        balance={balanceArray(nominee)}
+        value={nominee}
         withBalance
       />
     );
@@ -153,10 +151,10 @@ class Account extends React.PureComponent<Props, State> {
   }
 
   private renderButtons () {
-    const { accountId, intentions, staking_nominating, t } = this.props;
-    const { isNominating } = this.state;
+    const { accountId, intentions, t } = this.props;
+    const { nominee } = this.state;
     const isIntending = intentions.includes(accountId);
-    const canStake = !isIntending && !isNominating;
+    const canStake = !isIntending && !nominee;
 
     if (canStake) {
       return (
@@ -176,12 +174,12 @@ class Account extends React.PureComponent<Props, State> {
       );
     }
 
-    if (isNominating) {
+    if (nominee) {
       return (
         <Button.Group>
           <UnnominateButton
             accountId={accountId || ''}
-            nominating={staking_nominating || ''}
+            nominating={nominee}
             onClick={this.unnominate}
           />
         </Button.Group>
diff --git a/packages/app-staking/src/StakeList/UnnominateButton.tsx b/packages/app-staking/src/StakeList/UnnominateButton.tsx
index a364d0d23d..f429a28425 100644
--- a/packages/app-staking/src/StakeList/UnnominateButton.tsx
+++ b/packages/app-staking/src/StakeList/UnnominateButton.tsx
@@ -7,13 +7,14 @@ import { I18nProps } from '@polkadot/ui-app/types';
 import React from 'react';
 import { Button } from '@polkadot/ui-app';
 import { withCall, withMulti } from '@polkadot/ui-api';
+import { AccountId, Vector } from '@polkadot/types';
 
 import translate from '../translate';
 
 type Props = I18nProps & {
   accountId: string,
-  nominating: string,
-  staking_nominatorsFor: Array<string>,
+  nominating: AccountId,
+  staking_nominatorsFor: Vector<AccountId>,
   onClick: (index: number) => void
 };
 
@@ -41,9 +42,7 @@ class UnnominateButton extends React.Component<Props> {
 
     onClick(
       staking_nominatorsFor
-        .map((accountId) =>
-          accountId.toString()
-        )
+        .map((accountId) => accountId.toString())
         .indexOf(accountId));
   }
 }
diff --git a/packages/ui-api/src/with/call.tsx b/packages/ui-api/src/with/call.tsx
index 4b067131d9..d9d7d6478a 100644
--- a/packages/ui-api/src/with/call.tsx
+++ b/packages/ui-api/src/with/call.tsx
@@ -5,7 +5,6 @@
 import { ApiProps, CallState, Subtract } from '../types';
 import { Options } from './types';
 
-import memoize from 'memoizee';
 import React from 'react';
 import { assert, isNull, isUndefined } from '@polkadot/util';
 
@@ -159,7 +158,7 @@ export default function withCall<P extends ApiProps> (endpoint: string, { at, at
           await this.unsubscribe();
 
           if (isSubscription) {
-            this.destroy = await memoize(apiMethod)(...params, (value?: any) =>
+            this.destroy = await apiMethod(...params, (value?: any) =>
               this.triggerUpdate(this.props, value)
             );
           } else {