diff --git a/frontend/src/Activity/History/Details/HistoryDetailsModal.tsx b/frontend/src/Activity/History/Details/HistoryDetailsModal.tsx
index a833bca5b..a33e0b1ba 100644
--- a/frontend/src/Activity/History/Details/HistoryDetailsModal.tsx
+++ b/frontend/src/Activity/History/Details/HistoryDetailsModal.tsx
@@ -51,7 +51,7 @@ function HistoryDetailsModal(props: HistoryDetailsModalProps) {
     sourceTitle,
     data,
     downloadId,
-    isMarkingAsFailed,
+    isMarkingAsFailed = false,
     shortDateFormat,
     timeFormat,
     onMarkAsFailedPress,
@@ -93,8 +93,4 @@ function HistoryDetailsModal(props: HistoryDetailsModalProps) {
   );
 }
 
-HistoryDetailsModal.defaultProps = {
-  isMarkingAsFailed: false,
-};
-
 export default HistoryDetailsModal;
diff --git a/frontend/src/Activity/History/HistoryRow.tsx b/frontend/src/Activity/History/HistoryRow.tsx
index bcd84f606..c24f6a286 100644
--- a/frontend/src/Activity/History/HistoryRow.tsx
+++ b/frontend/src/Activity/History/HistoryRow.tsx
@@ -61,7 +61,7 @@ function HistoryRow(props: HistoryRowProps) {
     date,
     data,
     downloadId,
-    isMarkingAsFailed,
+    isMarkingAsFailed = false,
     markAsFailedError,
     columns,
   } = props;
@@ -268,8 +268,4 @@ function HistoryRow(props: HistoryRowProps) {
   );
 }
 
-HistoryRow.defaultProps = {
-  customFormats: [],
-};
-
 export default HistoryRow;
diff --git a/frontend/src/Activity/Queue/QueueStatus.tsx b/frontend/src/Activity/Queue/QueueStatus.tsx
index d7314baff..64d802df8 100644
--- a/frontend/src/Activity/Queue/QueueStatus.tsx
+++ b/frontend/src/Activity/Queue/QueueStatus.tsx
@@ -155,10 +155,4 @@ function QueueStatus(props: QueueStatusProps) {
   );
 }
 
-QueueStatus.defaultProps = {
-  trackedDownloadStatus: 'ok',
-  trackedDownloadState: 'downloading',
-  canFlip: false,
-};
-
 export default QueueStatus;
diff --git a/frontend/src/App/App.tsx b/frontend/src/App/App.tsx
index 6c2d799f3..0014c1d3f 100644
--- a/frontend/src/App/App.tsx
+++ b/frontend/src/App/App.tsx
@@ -1,5 +1,4 @@
 import { ConnectedRouter, ConnectedRouterProps } from 'connected-react-router';
-import PropTypes from 'prop-types';
 import React from 'react';
 import DocumentTitle from 'react-document-title';
 import { Provider } from 'react-redux';
@@ -20,7 +19,7 @@ function App({ store, history }: AppProps) {
         <ConnectedRouter history={history}>
           <ApplyTheme />
           <PageConnector>
-            <AppRoutes app={App} />
+            <AppRoutes />
           </PageConnector>
         </ConnectedRouter>
       </Provider>
@@ -28,9 +27,4 @@ function App({ store, history }: AppProps) {
   );
 }
 
-App.propTypes = {
-  store: PropTypes.object.isRequired,
-  history: PropTypes.object.isRequired,
-};
-
 export default App;
diff --git a/frontend/src/App/AppRoutes.tsx b/frontend/src/App/AppRoutes.tsx
index e3bf426c9..1b4fea9c2 100644
--- a/frontend/src/App/AppRoutes.tsx
+++ b/frontend/src/App/AppRoutes.tsx
@@ -1,4 +1,3 @@
-import PropTypes from 'prop-types';
 import React from 'react';
 import { Redirect, Route } from 'react-router-dom';
 import Blocklist from 'Activity/Blocklist/Blocklist';
@@ -165,8 +164,4 @@ function AppRoutes() {
   );
 }
 
-AppRoutes.propTypes = {
-  app: PropTypes.func.isRequired,
-};
-
 export default AppRoutes;
diff --git a/frontend/src/App/State/SystemAppState.ts b/frontend/src/App/State/SystemAppState.ts
index d20dacc51..1161f0e1e 100644
--- a/frontend/src/App/State/SystemAppState.ts
+++ b/frontend/src/App/State/SystemAppState.ts
@@ -8,15 +8,15 @@ import AppSectionState, { AppSectionItemState } from './AppSectionState';
 export type DiskSpaceAppState = AppSectionState<DiskSpace>;
 export type HealthAppState = AppSectionState<Health>;
 export type SystemStatusAppState = AppSectionItemState<SystemStatus>;
-export type UpdateAppState = AppSectionState<Update>;
 export type TaskAppState = AppSectionState<Task>;
+export type UpdateAppState = AppSectionState<Update>;
 
 interface SystemAppState {
   diskSpace: DiskSpaceAppState;
   health: HealthAppState;
-  updates: UpdateAppState;
   status: SystemStatusAppState;
   tasks: TaskAppState;
+  updates: UpdateAppState;
 }
 
 export default SystemAppState;
diff --git a/frontend/src/Commands/Command.ts b/frontend/src/Commands/Command.ts
index d0797a79a..ed0a449ab 100644
--- a/frontend/src/Commands/Command.ts
+++ b/frontend/src/Commands/Command.ts
@@ -26,7 +26,7 @@ export interface CommandBody {
   seriesId?: number;
   seriesIds?: number[];
   seasonNumber?: number;
-  [key: string]: string | number | boolean | undefined | number[] | undefined;
+  [key: string]: string | number | boolean | number[] | undefined;
 }
 
 interface Command extends ModelBase {
diff --git a/frontend/src/Components/Form/SeriesTypeSelectInput.tsx b/frontend/src/Components/Form/SeriesTypeSelectInput.tsx
index cea7f4fb5..17082c75c 100644
--- a/frontend/src/Components/Form/SeriesTypeSelectInput.tsx
+++ b/frontend/src/Components/Form/SeriesTypeSelectInput.tsx
@@ -46,9 +46,9 @@ function SeriesTypeSelectInput(props: SeriesTypeSelectInputProps) {
   const values = [...seriesTypeOptions];
 
   const {
-    includeNoChange,
+    includeNoChange = false,
     includeNoChangeDisabled = true,
-    includeMixed,
+    includeMixed = false,
   } = props;
 
   if (includeNoChange) {
@@ -77,9 +77,4 @@ function SeriesTypeSelectInput(props: SeriesTypeSelectInputProps) {
   );
 }
 
-SeriesTypeSelectInput.defaultProps = {
-  includeNoChange: false,
-  includeMixed: false,
-};
-
 export default SeriesTypeSelectInput;
diff --git a/frontend/src/System/Status/Status.tsx b/frontend/src/System/Status/Status.tsx
index ae1636b3e..74fdf25d8 100644
--- a/frontend/src/System/Status/Status.tsx
+++ b/frontend/src/System/Status/Status.tsx
@@ -1,4 +1,4 @@
-import React, { Component } from 'react';
+import React from 'react';
 import PageContent from 'Components/Page/PageContent';
 import PageContentBody from 'Components/Page/PageContentBody';
 import translate from 'Utilities/String/translate';
@@ -7,22 +7,17 @@ import DiskSpace from './DiskSpace/DiskSpace';
 import Health from './Health/Health';
 import MoreInfo from './MoreInfo/MoreInfo';
 
-class Status extends Component {
-  //
-  // Render
-
-  render() {
-    return (
-      <PageContent title={translate('Status')}>
-        <PageContentBody>
-          <Health />
-          <DiskSpace />
-          <About />
-          <MoreInfo />
-        </PageContentBody>
-      </PageContent>
-    );
-  }
+function Status() {
+  return (
+    <PageContent title={translate('Status')}>
+      <PageContentBody>
+        <Health />
+        <DiskSpace />
+        <About />
+        <MoreInfo />
+      </PageContentBody>
+    </PageContent>
+  );
 }
 
 export default Status;