diff --git a/src/components/Dialogs/AlertDialog.js b/src/components/Dialogs/AlertDialog.tsx
similarity index 58%
rename from src/components/Dialogs/AlertDialog.js
rename to src/components/Dialogs/AlertDialog.tsx
index 4ad7aad..642bc9b 100644
--- a/src/components/Dialogs/AlertDialog.js
+++ b/src/components/Dialogs/AlertDialog.tsx
@@ -17,36 +17,31 @@
  * along with Campus INSAT.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-// @flow
-
 import * as React from 'react';
 import {Button, Dialog, Paragraph, Portal} from 'react-native-paper';
 import i18n from 'i18n-js';
 
 type PropsType = {
-  visible: boolean,
-  onDismiss: () => void,
-  title: string | React.Node,
-  message: string | React.Node,
+  visible: boolean;
+  onDismiss: () => void;
+  title: string | React.ReactNode;
+  message: string | React.ReactNode;
 };
 
-class AlertDialog extends React.PureComponent<PropsType> {
-  render(): React.Node {
-    const {props} = this;
-    return (
-      <Portal>
-        <Dialog visible={props.visible} onDismiss={props.onDismiss}>
-          <Dialog.Title>{props.title}</Dialog.Title>
-          <Dialog.Content>
-            <Paragraph>{props.message}</Paragraph>
-          </Dialog.Content>
-          <Dialog.Actions>
-            <Button onPress={props.onDismiss}>{i18n.t('dialog.ok')}</Button>
-          </Dialog.Actions>
-        </Dialog>
-      </Portal>
-    );
-  }
+function AlertDialog(props: PropsType) {
+  return (
+    <Portal>
+      <Dialog visible={props.visible} onDismiss={props.onDismiss}>
+        <Dialog.Title>{props.title}</Dialog.Title>
+        <Dialog.Content>
+          <Paragraph>{props.message}</Paragraph>
+        </Dialog.Content>
+        <Dialog.Actions>
+          <Button onPress={props.onDismiss}>{i18n.t('dialog.ok')}</Button>
+        </Dialog.Actions>
+      </Dialog>
+    </Portal>
+  );
 }
 
 export default AlertDialog;
diff --git a/src/components/Dialogs/ErrorDialog.js b/src/components/Dialogs/ErrorDialog.js
deleted file mode 100644
index b228ce1..0000000
--- a/src/components/Dialogs/ErrorDialog.js
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (c) 2019 - 2020 Arnaud Vergnet.
- *
- * This file is part of Campus INSAT.
- *
- * Campus INSAT is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Campus INSAT is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Campus INSAT.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-// @flow
-
-import * as React from 'react';
-import i18n from 'i18n-js';
-import {ERROR_TYPE} from '../../utils/WebData';
-import AlertDialog from './AlertDialog';
-
-type PropsType = {
-  visible: boolean,
-  onDismiss: () => void,
-  errorCode: number,
-};
-
-class ErrorDialog extends React.PureComponent<PropsType> {
-  title: string;
-
-  message: string;
-
-  generateMessage() {
-    const {props} = this;
-    this.title = i18n.t('errors.title');
-    switch (props.errorCode) {
-      case ERROR_TYPE.BAD_CREDENTIALS:
-        this.message = i18n.t('errors.badCredentials');
-        break;
-      case ERROR_TYPE.BAD_TOKEN:
-        this.message = i18n.t('errors.badToken');
-        break;
-      case ERROR_TYPE.NO_CONSENT:
-        this.message = i18n.t('errors.noConsent');
-        break;
-      case ERROR_TYPE.TOKEN_SAVE:
-        this.message = i18n.t('errors.tokenSave');
-        break;
-      case ERROR_TYPE.TOKEN_RETRIEVE:
-        this.message = i18n.t('errors.unknown');
-        break;
-      case ERROR_TYPE.BAD_INPUT:
-        this.message = i18n.t('errors.badInput');
-        break;
-      case ERROR_TYPE.FORBIDDEN:
-        this.message = i18n.t('errors.forbidden');
-        break;
-      case ERROR_TYPE.CONNECTION_ERROR:
-        this.message = i18n.t('errors.connectionError');
-        break;
-      case ERROR_TYPE.SERVER_ERROR:
-        this.message = i18n.t('errors.serverError');
-        break;
-      default:
-        this.message = i18n.t('errors.unknown');
-        break;
-    }
-    this.message += `\n\nCode ${props.errorCode}`;
-  }
-
-  render(): React.Node {
-    this.generateMessage();
-    const {props} = this;
-    return (
-      <AlertDialog
-        visible={props.visible}
-        onDismiss={props.onDismiss}
-        title={this.title}
-        message={this.message}
-      />
-    );
-  }
-}
-
-export default ErrorDialog;
diff --git a/src/components/Dialogs/ErrorDialog.tsx b/src/components/Dialogs/ErrorDialog.tsx
new file mode 100644
index 0000000..b726d56
--- /dev/null
+++ b/src/components/Dialogs/ErrorDialog.tsx
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019 - 2020 Arnaud Vergnet.
+ *
+ * This file is part of Campus INSAT.
+ *
+ * Campus INSAT is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Campus INSAT is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Campus INSAT.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as React from 'react';
+import i18n from 'i18n-js';
+import {ERROR_TYPE} from '../../utils/WebData';
+import AlertDialog from './AlertDialog';
+
+type PropsType = {
+  visible: boolean;
+  onDismiss: () => void;
+  errorCode: number;
+};
+
+function ErrorDialog(props: PropsType) {
+  let title: string;
+  let message: string;
+
+  title = i18n.t('errors.title');
+  switch (props.errorCode) {
+    case ERROR_TYPE.BAD_CREDENTIALS:
+      message = i18n.t('errors.badCredentials');
+      break;
+    case ERROR_TYPE.BAD_TOKEN:
+      message = i18n.t('errors.badToken');
+      break;
+    case ERROR_TYPE.NO_CONSENT:
+      message = i18n.t('errors.noConsent');
+      break;
+    case ERROR_TYPE.TOKEN_SAVE:
+      message = i18n.t('errors.tokenSave');
+      break;
+    case ERROR_TYPE.TOKEN_RETRIEVE:
+      message = i18n.t('errors.unknown');
+      break;
+    case ERROR_TYPE.BAD_INPUT:
+      message = i18n.t('errors.badInput');
+      break;
+    case ERROR_TYPE.FORBIDDEN:
+      message = i18n.t('errors.forbidden');
+      break;
+    case ERROR_TYPE.CONNECTION_ERROR:
+      message = i18n.t('errors.connectionError');
+      break;
+    case ERROR_TYPE.SERVER_ERROR:
+      message = i18n.t('errors.serverError');
+      break;
+    default:
+      message = i18n.t('errors.unknown');
+      break;
+  }
+  message += `\n\nCode ${props.errorCode}`;
+
+  return (
+    <AlertDialog
+      visible={props.visible}
+      onDismiss={props.onDismiss}
+      title={title}
+      message={message}
+    />
+  );
+}
+
+export default ErrorDialog;
diff --git a/src/components/Dialogs/LoadingConfirmDialog.js b/src/components/Dialogs/LoadingConfirmDialog.tsx
similarity index 82%
rename from src/components/Dialogs/LoadingConfirmDialog.js
rename to src/components/Dialogs/LoadingConfirmDialog.tsx
index 41382c8..914ff13 100644
--- a/src/components/Dialogs/LoadingConfirmDialog.js
+++ b/src/components/Dialogs/LoadingConfirmDialog.tsx
@@ -17,8 +17,6 @@
  * along with Campus INSAT.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-// @flow
-
 import * as React from 'react';
 import {
   ActivityIndicator,
@@ -30,20 +28,23 @@ import {
 import i18n from 'i18n-js';
 
 type PropsType = {
-  visible: boolean,
-  onDismiss?: () => void,
-  onAccept?: () => Promise<void>, // async function to be executed
-  title?: string,
-  titleLoading?: string,
-  message?: string,
-  startLoading?: boolean,
+  visible: boolean;
+  onDismiss?: () => void;
+  onAccept?: () => Promise<void>; // async function to be executed
+  title?: string;
+  titleLoading?: string;
+  message?: string;
+  startLoading?: boolean;
 };
 
 type StateType = {
-  loading: boolean,
+  loading: boolean;
 };
 
-class LoadingConfirmDialog extends React.PureComponent<PropsType, StateType> {
+export default class LoadingConfirmDialog extends React.PureComponent<
+  PropsType,
+  StateType
+> {
   static defaultProps = {
     onDismiss: () => {},
     onAccept: (): Promise<void> => {
@@ -71,14 +72,16 @@ class LoadingConfirmDialog extends React.PureComponent<PropsType, StateType> {
   onClickAccept = () => {
     const {props} = this;
     this.setState({loading: true});
-    if (props.onAccept != null) props.onAccept().then(this.hideLoading);
+    if (props.onAccept != null) {
+      props.onAccept().then(this.hideLoading);
+    }
   };
 
   /**
    * Waits for fade out animations to finish before hiding loading
-   * @returns {TimeoutID}
+   * @returns {NodeJS.Timeout}
    */
-  hideLoading = (): TimeoutID =>
+  hideLoading = (): NodeJS.Timeout =>
     setTimeout(() => {
       this.setState({loading: false});
     }, 200);
@@ -88,10 +91,12 @@ class LoadingConfirmDialog extends React.PureComponent<PropsType, StateType> {
    */
   onDismiss = () => {
     const {state, props} = this;
-    if (!state.loading && props.onDismiss != null) props.onDismiss();
+    if (!state.loading && props.onDismiss != null) {
+      props.onDismiss();
+    }
   };
 
-  render(): React.Node {
+  render() {
     const {state, props} = this;
     return (
       <Portal>
@@ -121,5 +126,3 @@ class LoadingConfirmDialog extends React.PureComponent<PropsType, StateType> {
     );
   }
 }
-
-export default LoadingConfirmDialog;
diff --git a/src/components/Dialogs/OptionsDialog.js b/src/components/Dialogs/OptionsDialog.tsx
similarity index 54%
rename from src/components/Dialogs/OptionsDialog.js
rename to src/components/Dialogs/OptionsDialog.tsx
index 1ef7349..c311995 100644
--- a/src/components/Dialogs/OptionsDialog.js
+++ b/src/components/Dialogs/OptionsDialog.tsx
@@ -17,28 +17,26 @@
  * along with Campus INSAT.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-// @flow
-
 import * as React from 'react';
 import {Button, Dialog, Paragraph, Portal} from 'react-native-paper';
 import {FlatList} from 'react-native';
 
 export type OptionsDialogButtonType = {
-  title: string,
-  icon?: string,
-  onPress: () => void,
+  title: string;
+  icon?: string;
+  onPress: () => void;
 };
 
 type PropsType = {
-  visible: boolean,
-  title: string,
-  message: string,
-  buttons: Array<OptionsDialogButtonType>,
-  onDismiss: () => void,
+  visible: boolean;
+  title: string;
+  message: string;
+  buttons: Array<OptionsDialogButtonType>;
+  onDismiss: () => void;
 };
 
-class OptionsDialog extends React.PureComponent<PropsType> {
-  getButtonRender = ({item}: {item: OptionsDialogButtonType}): React.Node => {
+function OptionsDialog(props: PropsType) {
+  const getButtonRender = ({item}: {item: OptionsDialogButtonType}) => {
     return (
       <Button onPress={item.onPress} icon={item.icon}>
         {item.title}
@@ -46,35 +44,32 @@ class OptionsDialog extends React.PureComponent<PropsType> {
     );
   };
 
-  keyExtractor = (item: OptionsDialogButtonType): string => {
+  const keyExtractor = (item: OptionsDialogButtonType): string => {
     if (item.icon != null) {
       return item.title + item.icon;
     }
     return item.title;
   };
 
-  render(): React.Node {
-    const {props} = this;
-    return (
-      <Portal>
-        <Dialog visible={props.visible} onDismiss={props.onDismiss}>
-          <Dialog.Title>{props.title}</Dialog.Title>
-          <Dialog.Content>
-            <Paragraph>{props.message}</Paragraph>
-          </Dialog.Content>
-          <Dialog.Actions>
-            <FlatList
-              data={props.buttons}
-              renderItem={this.getButtonRender}
-              keyExtractor={this.keyExtractor}
-              horizontal
-              inverted
-            />
-          </Dialog.Actions>
-        </Dialog>
-      </Portal>
-    );
-  }
+  return (
+    <Portal>
+      <Dialog visible={props.visible} onDismiss={props.onDismiss}>
+        <Dialog.Title>{props.title}</Dialog.Title>
+        <Dialog.Content>
+          <Paragraph>{props.message}</Paragraph>
+        </Dialog.Content>
+        <Dialog.Actions>
+          <FlatList
+            data={props.buttons}
+            renderItem={getButtonRender}
+            keyExtractor={keyExtractor}
+            horizontal
+            inverted
+          />
+        </Dialog.Actions>
+      </Dialog>
+    </Portal>
+  );
 }
 
 export default OptionsDialog;