diff --git a/landing/team.react.js b/landing/team.react.js
--- a/landing/team.react.js
+++ b/landing/team.react.js
@@ -4,7 +4,7 @@
 
 import { assetsCacheURLPrefix } from './asset-meta-data';
 import Button from './button.react.js';
-import TeamProfile from './team-profile.react.js';
+import TeamProfile from './team-profile.react';
 import css from './team.css';
 
 function Team(): React.Node {
diff --git a/lib/shared/emojis.js b/lib/shared/emojis.js
--- a/lib/shared/emojis.js
+++ b/lib/shared/emojis.js
@@ -1,6 +1,6 @@
 // @flow
 
-import emojiRegex from 'emoji-regex/RGI_Emoji.js';
+import emojiRegex from 'emoji-regex/RGI_Emoji';
 import invariant from 'invariant';
 
 const emojiRegexMatches = emojiRegex().toString().match('^/(.+)/g$');
diff --git a/lib/utils/message-ops-utils.test.js b/lib/utils/message-ops-utils.test.js
--- a/lib/utils/message-ops-utils.test.js
+++ b/lib/utils/message-ops-utils.test.js
@@ -6,7 +6,7 @@
 import type { RawCreateEntryMessageInfo } from '../types/messages/create-entry';
 import type { RawCreateSidebarMessageInfo } from '../types/messages/create-sidebar';
 import type { RawCreateSubthreadMessageInfo } from '../types/messages/create-subthread';
-import type { RawCreateThreadMessageInfo } from '../types/messages/create-thread.js';
+import type { RawCreateThreadMessageInfo } from '../types/messages/create-thread';
 import type { RawDeleteEntryMessageInfo } from '../types/messages/delete-entry';
 import type { RawEditEntryMessageInfo } from '../types/messages/edit-entry';
 import type { RawImagesMessageInfo } from '../types/messages/images';
diff --git a/web/chat/message-action-buttons.js b/web/chat/message-action-buttons.js
--- a/web/chat/message-action-buttons.js
+++ b/web/chat/message-action-buttons.js
@@ -7,10 +7,10 @@
 import type { ChatMessageInfoItem } from 'lib/selectors/chat-selectors';
 import { useSidebarExistsOrCanBeCreated } from 'lib/shared/thread-utils';
 import type { ThreadInfo } from 'lib/types/thread-types';
-import { longAbsoluteDate } from 'lib/utils/date-utils.js';
+import { longAbsoluteDate } from 'lib/utils/date-utils';
 
-import type { InputState } from '../input/input-state.js';
-import { useSelector } from '../redux/redux-utils.js';
+import type { InputState } from '../input/input-state';
+import { useSelector } from '../redux/redux-utils';
 import {
   useOnClickThread,
   useOnClickPendingSidebar,
diff --git a/web/modals/account/log-in-modal.react.js b/web/modals/account/log-in-modal.react.js
--- a/web/modals/account/log-in-modal.react.js
+++ b/web/modals/account/log-in-modal.react.js
@@ -2,7 +2,7 @@
 
 import * as React from 'react';
 
-import LoginForm from '../../account/log-in-form.react.js';
+import LoginForm from '../../account/log-in-form.react';
 import { useModalContext } from '../modal-provider.react';
 import Modal from '../modal.react';
 
diff --git a/web/sidebar/community-picker.react.js b/web/sidebar/community-picker.react.js
--- a/web/sidebar/community-picker.react.js
+++ b/web/sidebar/community-picker.react.js
@@ -3,7 +3,7 @@
 import * as React from 'react';
 
 import Button from '../components/button.react';
-import UserSettingsModal from '../modals/account/user-settings-modal.react.js';
+import UserSettingsModal from '../modals/account/user-settings-modal.react';
 import { useModalContext } from '../modals/modal-provider.react';
 import SWMansionIcon from '../SWMansionIcon.react';
 import css from './community-picker.css';