diff --git a/app/javascript/components/Board/BoardP.tsx b/app/javascript/components/Board/BoardP.tsx
index 708fe837..ded16311 100644
--- a/app/javascript/components/Board/BoardP.tsx
+++ b/app/javascript/components/Board/BoardP.tsx
@@ -6,7 +6,6 @@ import PostStatusFilter from './PostStatusFilter';
 import PostList from './PostList';
 
 import IBoard from '../../interfaces/IBoard';
-import IPost from '../../interfaces/IPost';
 
 import { PostsState } from '../../reducers/postsReducer';
 import { PostStatusesState } from '../../reducers/postStatusesReducer';
@@ -37,7 +36,7 @@ class BoardP extends React.Component<Props> {
     this.props.requestPostStatuses();
   }
 
-  componentDidUpdate(prevProps) {
+  componentDidUpdate(prevProps: Props) {
     const { searchQuery } = this.props.posts.filters;
     const prevSearchQuery = prevProps.posts.filters.searchQuery;
 
@@ -98,7 +97,6 @@ class BoardP extends React.Component<Props> {
         <PostList
           posts={posts.items}
           postStatuses={postStatuses.items}
-          page={posts.page}
           hasMore={posts.haveMore}
           areLoading={posts.areLoading}
           error={posts.error}
diff --git a/app/javascript/components/Board/NewPost.tsx b/app/javascript/components/Board/NewPost.tsx
index 6ed9c499..407a5c68 100644
--- a/app/javascript/components/Board/NewPost.tsx
+++ b/app/javascript/components/Board/NewPost.tsx
@@ -3,7 +3,6 @@ import * as React from 'react';
 import NewPostForm from './NewPostForm';
 import Spinner from '../shared/Spinner';
 import {
-  TitleText,
   MutedText,
   DangerText,
   SuccessText,
@@ -29,7 +28,7 @@ interface State {
 }
 
 class NewPost extends React.Component<Props, State> {
-  constructor(props) {
+  constructor(props: Props) {
     super(props);
 
     this.state = {
@@ -57,20 +56,20 @@ class NewPost extends React.Component<Props, State> {
     });
   }
 
-  onTitleChange(title) {
+  onTitleChange(title: string) {
     this.setState({
       title,
       error: '',
     });
   }
 
-  onDescriptionChange(description) {
+  onDescriptionChange(description: string) {
     this.setState({
       description,
     });
   }
 
-  async submitForm(e) {
+  async submitForm(e: React.FormEvent) {
     e.preventDefault();
 
     this.setState({
diff --git a/app/javascript/components/Board/PostList.tsx b/app/javascript/components/Board/PostList.tsx
index 261a1bd5..4d862296 100644
--- a/app/javascript/components/Board/PostList.tsx
+++ b/app/javascript/components/Board/PostList.tsx
@@ -19,7 +19,6 @@ interface Props {
   error: string;
 
   handleLoadMore(): void;
-  page: number;
   hasMore: boolean;
 }
 
@@ -29,7 +28,6 @@ const PostList = ({
   areLoading,
   error,
   handleLoadMore,
-  page,
   hasMore
 }: Props) => (
   <div className="postList">
diff --git a/app/javascript/components/Board/PostListItem.tsx b/app/javascript/components/Board/PostListItem.tsx
index 6487e2a5..ab46a3b4 100644
--- a/app/javascript/components/Board/PostListItem.tsx
+++ b/app/javascript/components/Board/PostListItem.tsx
@@ -2,7 +2,7 @@ import * as React from 'react';
 
 import CommentsNumber from '../shared/CommentsNumber';
 import PostStatusLabel from '../shared/PostStatusLabel';
-import { TitleText, DescriptionText } from '../shared/CustomTexts';
+import { DescriptionText } from '../shared/CustomTexts';
 
 import IPostStatus from '../../interfaces/IPostStatus';
 
diff --git a/app/javascript/components/Board/PostStatusListItem.tsx b/app/javascript/components/Board/PostStatusListItem.tsx
index 7f918f6b..9cdc573b 100644
--- a/app/javascript/components/Board/PostStatusListItem.tsx
+++ b/app/javascript/components/Board/PostStatusListItem.tsx
@@ -24,7 +24,7 @@ const PostStatusListItem = ({
   }>
     <a onClick={handleClick} className="postStatusListItemLink">
       <div className="postStatusListItem">
-        <PostStatusLabel id={undefined} name={name} color={color} />
+        <PostStatusLabel name={name} color={color} />
       </div>
     </a>
     {
diff --git a/app/javascript/components/Board/SearchFilter.tsx b/app/javascript/components/Board/SearchFilter.tsx
index d48a79e7..caae7079 100644
--- a/app/javascript/components/Board/SearchFilter.tsx
+++ b/app/javascript/components/Board/SearchFilter.tsx
@@ -12,6 +12,7 @@ const SearchFilter = ({ searchQuery, handleChange }: Props) => (
     <TitleText>Search:</TitleText>
     <input
       type="search"
+      value={searchQuery}
       onChange={e => handleChange(e.target.value)}
       id="searchPostInput"
       className="form-control"
diff --git a/app/javascript/components/Board/index.tsx b/app/javascript/components/Board/index.tsx
index e111c90a..ac8194bf 100644
--- a/app/javascript/components/Board/index.tsx
+++ b/app/javascript/components/Board/index.tsx
@@ -15,7 +15,7 @@ interface Props {
 class BoardRoot extends React.Component<Props> {
   store: any;
 
-  constructor(props) {
+  constructor(props: Props) {
     super(props);
 
     this.store = createStoreHelper();
diff --git a/app/javascript/components/Comments/Comment.tsx b/app/javascript/components/Comments/Comment.tsx
index 4626e778..30cc1dd1 100644
--- a/app/javascript/components/Comments/Comment.tsx
+++ b/app/javascript/components/Comments/Comment.tsx
@@ -1,5 +1,4 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import NewComment from './NewComment';
 import Separator from '../shared/Separator';
@@ -12,14 +11,12 @@ import friendlyDate from '../../helpers/friendlyDate';
 interface Props {
   id: number;
   body: string;
-  parentId: number;
   userFullName: string;
   updatedAt: string;
 
-  level: number;
   reply: CommentRepliesState;
   handleToggleCommentReply(): void;
-  handleCommentReplyBodyChange(e: FormEvent): void;
+  handleCommentReplyBodyChange(e: React.FormEvent): void;
   handleSubmitComment(body: string, parentId: number): void;
 
   isLoggedIn: boolean;
@@ -29,11 +26,9 @@ interface Props {
 const Comment = ({
   id,
   body,
-  parentId,
   userFullName,
   updatedAt,
 
-  level,
   reply,
   handleToggleCommentReply,
   handleCommentReplyBodyChange,
diff --git a/app/javascript/components/Comments/CommentList.tsx b/app/javascript/components/Comments/CommentList.tsx
index 2b085424..2551a8a2 100644
--- a/app/javascript/components/Comments/CommentList.tsx
+++ b/app/javascript/components/Comments/CommentList.tsx
@@ -1,5 +1,4 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import Comment from './Comment';
 
@@ -39,11 +38,10 @@ const CommentList = ({
         return (
           <div className="commentList" key={i}>
             <Comment
-              level={level}
               reply={replies.find(reply => reply.commentId === comment.id)}
               handleToggleCommentReply={() => toggleCommentReply(comment.id)}
               handleCommentReplyBodyChange={
-                (e: FormEvent) => (
+                (e: React.FormEvent) => (
                   setCommentReplyBody(comment.id, (e.target as HTMLTextAreaElement).value)
                 )
               }
diff --git a/app/javascript/components/Comments/CommentsP.tsx b/app/javascript/components/Comments/CommentsP.tsx
index 096d6909..77072770 100644
--- a/app/javascript/components/Comments/CommentsP.tsx
+++ b/app/javascript/components/Comments/CommentsP.tsx
@@ -1,10 +1,9 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import NewComment from './NewComment';
 import CommentList from './CommentList';
 import Spinner from '../shared/Spinner';
-import { DangerText, UppercaseText } from '../shared/CustomTexts';
+import { DangerText } from '../shared/CustomTexts';
 
 import IComment from '../../interfaces/IComment';
 import { CommentRepliesState } from '../../reducers/commentRepliesReducer';
@@ -36,7 +35,7 @@ class CommentsP extends React.Component<Props> {
     this.props.requestComments(this.props.postId);
   }
 
-  _handleSubmitComment = (body, parentId) => {
+  _handleSubmitComment = (body: string, parentId: number) => {
     this.props.submitComment(
       this.props.postId,
       body,
@@ -57,7 +56,6 @@ class CommentsP extends React.Component<Props> {
 
       toggleCommentReply,
       setCommentReplyBody,
-      submitComment,
     } = this.props;
 
     const postReply = replies.find(reply => reply.commentId === -1);
@@ -69,7 +67,7 @@ class CommentsP extends React.Component<Props> {
           parentId={null}
           isSubmitting={postReply && postReply.isSubmitting}
           handleChange={
-            (e: FormEvent) => (
+            (e: React.FormEvent) => (
               setCommentReplyBody(-1, (e.target as HTMLTextAreaElement).value)
             )
           }
diff --git a/app/javascript/components/Comments/NewComment.tsx b/app/javascript/components/Comments/NewComment.tsx
index e50f3043..128324b8 100644
--- a/app/javascript/components/Comments/NewComment.tsx
+++ b/app/javascript/components/Comments/NewComment.tsx
@@ -1,5 +1,4 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import Button from '../shared/Button';
 import Spinner from '../shared/Spinner';
@@ -8,7 +7,7 @@ interface Props {
   body: string;
   parentId: number;
   isSubmitting: boolean;
-  handleChange(e: FormEvent): void;
+  handleChange(e: React.FormEvent): void;
   handleSubmit(body: string, parentId: number): void;
 
   isLoggedIn: boolean;
diff --git a/app/javascript/components/Post/PostBoardSelect.tsx b/app/javascript/components/Post/PostBoardSelect.tsx
index 7c3a88cc..f4c05009 100644
--- a/app/javascript/components/Post/PostBoardSelect.tsx
+++ b/app/javascript/components/Post/PostBoardSelect.tsx
@@ -1,5 +1,4 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import IBoard from '../../interfaces/IBoard';
 
@@ -20,7 +19,7 @@ const PostBoardSelect = ({
   <select
     value={selectedBoardId || 'Loading...'}
     onChange={
-      (e: FormEvent) => (
+      (e: React.FormEvent) => (
         handleChange(parseInt((e.target as HTMLSelectElement).value))
     )}
     id="selectPickerBoard"
diff --git a/app/javascript/components/Post/PostStatusSelect.tsx b/app/javascript/components/Post/PostStatusSelect.tsx
index 7de83a0e..d01daa0a 100644
--- a/app/javascript/components/Post/PostStatusSelect.tsx
+++ b/app/javascript/components/Post/PostStatusSelect.tsx
@@ -1,5 +1,4 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 import IPostStatus from '../../interfaces/IPostStatus';
 
@@ -22,7 +21,7 @@ const PostStatusSelect = ({
   <select
     value={selectedPostStatusId || NO_POST_STATUS_VALUE}
     onChange={
-      (e: FormEvent) => (
+      (e: React.FormEvent) => (
         handleChange(parseInt((e.target as HTMLSelectElement).value))
     )}
     id="selectPickerStatus"
diff --git a/app/javascript/components/Post/index.tsx b/app/javascript/components/Post/index.tsx
index 5dd20660..3c00c38d 100644
--- a/app/javascript/components/Post/index.tsx
+++ b/app/javascript/components/Post/index.tsx
@@ -20,7 +20,7 @@ interface Props {
 class PostRoot extends React.Component<Props> {
   store: any;
 
-  constructor(props) {
+  constructor(props: Props) {
     super(props);
 
     this.store = createStoreHelper();
diff --git a/app/javascript/components/shared/Button.tsx b/app/javascript/components/shared/Button.tsx
index 43a74b74..4d0039ac 100644
--- a/app/javascript/components/shared/Button.tsx
+++ b/app/javascript/components/shared/Button.tsx
@@ -1,9 +1,8 @@
 import * as React from 'react';
-import { FormEvent } from 'react';
 
 interface Props {
   children: any;
-  onClick(e: FormEvent): void;
+  onClick(e: React.FormEvent): void;
   className?: string;
   outline?: boolean;
 }
diff --git a/app/javascript/components/shared/PostStatusLabel.tsx b/app/javascript/components/shared/PostStatusLabel.tsx
index 58bc801e..831e4947 100644
--- a/app/javascript/components/shared/PostStatusLabel.tsx
+++ b/app/javascript/components/shared/PostStatusLabel.tsx
@@ -1,12 +1,14 @@
 import * as React from 'react';
 
-import IPostStatus from '../../interfaces/IPostStatus';
+interface Props {
+  name: string;
+  color: string;
+}
 
 const PostStatusLabel = ({
-  id,
   name,
   color,
-}: IPostStatus) => (
+}: Props) => (
   <span className="badge" style={{backgroundColor: color, color: 'white'}}>{name}</span>
 );
 
diff --git a/app/javascript/containers/Post.tsx b/app/javascript/containers/Post.tsx
index e6e18a5a..aefdf247 100644
--- a/app/javascript/containers/Post.tsx
+++ b/app/javascript/containers/Post.tsx
@@ -1,7 +1,6 @@
 import { connect } from 'react-redux';
 
 import { requestPost } from '../actions/requestPost';
-import { requestComments } from '../actions/requestComments';
 import { changePostBoard } from '../actions/changePostBoard';
 import { changePostStatus } from '../actions/changePostStatus';
 
diff --git a/app/javascript/reducers/commentRepliesReducer.ts b/app/javascript/reducers/commentRepliesReducer.ts
index 31033942..e11e8108 100644
--- a/app/javascript/reducers/commentRepliesReducer.ts
+++ b/app/javascript/reducers/commentRepliesReducer.ts
@@ -3,7 +3,6 @@ import {
 } from '../actions/requestComment';
 
 import {
-  HandleCommentRepliesType,
   TOGGLE_COMMENT_REPLY,
   SET_COMMENT_REPLY_BODY,
 } from '../actions/handleCommentReplies';
diff --git a/app/javascript/reducers/commentsReducer.ts b/app/javascript/reducers/commentsReducer.ts
index bb363774..1df52aa0 100644
--- a/app/javascript/reducers/commentsReducer.ts
+++ b/app/javascript/reducers/commentsReducer.ts
@@ -1,5 +1,4 @@
 import {
-  CommentsRequestActionTypes,
   COMMENTS_REQUEST_START,
   COMMENTS_REQUEST_SUCCESS,
   COMMENTS_REQUEST_FAILURE,
@@ -8,7 +7,6 @@ import {
 import { commentRequestSuccess } from '../actions/requestComment';
 
 import {
-  HandleCommentRepliesType,
   TOGGLE_COMMENT_REPLY,
   SET_COMMENT_REPLY_BODY,
 } from '../actions/handleCommentReplies';
@@ -23,6 +21,7 @@ import commentReducer from './commentReducer';
 import commentRepliesReducer from './commentRepliesReducer';
 
 import IComment from '../interfaces/IComment';
+import ICommentJSON from '../interfaces/json/IComment';
 import { CommentRepliesState } from './commentRepliesReducer';
 
 export interface CommentsState {
@@ -54,11 +53,11 @@ const commentsReducer = (
       return {
         ...state,
         items: action.comments.map(
-          comment => commentReducer(undefined, commentRequestSuccess(comment))
+          (comment: ICommentJSON) => commentReducer(undefined, commentRequestSuccess(comment))
         ),
         replies: [commentRepliesReducer(undefined, {type: 'COMMENT_REQUEST_SUCCESS', comment: { id: -1 } }),
           ...action.comments.map(
-            comment => commentRepliesReducer(undefined, commentRequestSuccess(comment))
+            (comment: ICommentJSON) => commentRepliesReducer(undefined, commentRequestSuccess(comment))
         )],
         areLoading: false,
         error: '',