diff --git a/src/account-info/ProfileCard.js b/src/account-info/ProfileCard.js
index 3772fa887b4..e2298cbd161 100644
--- a/src/account-info/ProfileCard.js
+++ b/src/account-info/ProfileCard.js
@@ -26,7 +26,7 @@ const styles = StyleSheet.create({
   },
 });
 
-class SetStatusButton extends PureComponent<{| dispatch: Dispatch |}> {
+class SetStatusButton extends PureComponent<{| +dispatch: Dispatch |}> {
   onPress = () => {
     const { dispatch } = this.props;
     dispatch(navigateToUserStatus());
@@ -39,7 +39,7 @@ class SetStatusButton extends PureComponent<{| dispatch: Dispatch |}> {
   }
 }
 
-class SwitchAccountButton extends PureComponent<{| dispatch: Dispatch |}> {
+class SwitchAccountButton extends PureComponent<{| +dispatch: Dispatch |}> {
   onPress = () => {
     this.props.dispatch(navigateToAccountPicker());
   };
@@ -51,7 +51,7 @@ class SwitchAccountButton extends PureComponent<{| dispatch: Dispatch |}> {
   }
 }
 
-class LogoutButton extends PureComponent<{| dispatch: Dispatch |}> {
+class LogoutButton extends PureComponent<{| +dispatch: Dispatch |}> {
   onPress = () => {
     const { dispatch } = this.props;
     dispatch(tryStopNotifications());
diff --git a/src/boot/TranslationProvider.js b/src/boot/TranslationProvider.js
index d86896c8d99..22a9fc207ca 100644
--- a/src/boot/TranslationProvider.js
+++ b/src/boot/TranslationProvider.js
@@ -54,7 +54,7 @@ const makeGetText = (intl: IntlShape): GetText => {
  * vs. https://reactjs.org/docs/legacy-context.html .
  */
 class TranslationContextTranslator extends PureComponent<{
-  children: React$Node,
+  +children: React$Node,
 }> {
   context: { intl: IntlShape };
 
diff --git a/src/common/InputWithClearButton.js b/src/common/InputWithClearButton.js
index 939096f870a..1afbb2b4cb4 100644
--- a/src/common/InputWithClearButton.js
+++ b/src/common/InputWithClearButton.js
@@ -14,7 +14,7 @@ const componentStyles = StyleSheet.create({
   },
 });
 
-type Props = $Diff<InputProps, { textInputRef: mixed, value: mixed }>;
+type Props = $ReadOnly<$Diff<InputProps, { textInputRef: mixed, value: mixed }>>;
 
 type State = {|
   canBeCleared: boolean,
diff --git a/src/common/PasswordInput.js b/src/common/PasswordInput.js
index 3d9e624c354..918015829cc 100644
--- a/src/common/PasswordInput.js
+++ b/src/common/PasswordInput.js
@@ -24,10 +24,10 @@ const styles = StyleSheet.create({
 
 // Prettier wants a ", >" here, which is silly.
 // prettier-ignore
-type Props = $Diff<InputProps,
+type Props = $ReadOnly<$Diff<InputProps,
   // "mixed" here is a way of spelling "no matter *what* type
   // `InputProps` allows for these, don't allow them here."
-  { secureTextEntry: mixed, autoCorrect: mixed, autoCapitalize: mixed }>;
+  { secureTextEntry: mixed, autoCorrect: mixed, autoCapitalize: mixed }>>;
 
 type State = {|
   isHidden: boolean,