5 files changed, 12 insertions, 7 deletions
diff --git a/src/index.tsx b/src/index.tsx
index 4e1f35f..7af6098 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -13,6 +13,11 @@ import {
 
 import icon from './assets/icon.svg';
 
+interface RenderPropTypes {
+  index: number;
+  style: React.CSSProperties;
+}
+
 
 const useStyles = makeStyles(theme => ({
   window: {
@@ -29,13 +34,13 @@ const headerContents = {
   'another page': null,
 };
 
-const renderItem = ({ index, style }: any) => {
+const renderItem: React.FC<RenderPropTypes> = ({ index, style}) => {
   return (
       <Typography variant="h3" style={style} component="div"> {index} </Typography>
   );
 };
 
-const App = () => {
+const App: React.FC = () => {
   const classes = useStyles();
   const [page, setPage] = useState('home');
 
diff --git a/src/lib/Header/Header.tsx b/src/lib/Header/Header.tsx
index 7f3d35d..233eacb 100644
--- a/src/lib/Header/Header.tsx
+++ b/src/lib/Header/Header.tsx
@@ -23,7 +23,7 @@ interface PropTypes {
   setPage: (newPage: string) => void;
 }
 
-const useStyles = makeStyles((theme: any) => ({
+const useStyles = makeStyles(theme => ({
   root: {
     background: theme.palette.background.elevation2,
     color: theme.palette.text.primary,
@@ -49,7 +49,7 @@ const useStyles = makeStyles((theme: any) => ({
 const Header: React.FC<PropTypes> = ({ logo, contents, page, setPage }) => {
   const classes = useStyles();
 
-  const handleChange = (event: React.ChangeEvent<{}>, newPage: string) => {
+  const handleChange = (event: React.ChangeEvent<{}>, newPage: string): void => {
     setPage(newPage);
   };
 
diff --git a/src/lib/SmartList/SmartList.tsx b/src/lib/SmartList/SmartList.tsx
index c889719..22cd3b2 100644
--- a/src/lib/SmartList/SmartList.tsx
+++ b/src/lib/SmartList/SmartList.tsx
@@ -5,7 +5,7 @@ import AutoSizer from 'react-virtualized-auto-sizer';
 
 interface RenderPropTypes {
   index: number;
-  style: any;
+  style: React.CSSProperties;
 }
 
 interface PropTypes {
diff --git a/src/lib/Window/Window.tsx b/src/lib/Window/Window.tsx
index ea8e264..6821593 100644
--- a/src/lib/Window/Window.tsx
+++ b/src/lib/Window/Window.tsx
@@ -12,7 +12,7 @@ interface PropTypes {
 }
 
 
-const useStyles = makeStyles((theme: any) => ({
+const useStyles = makeStyles(theme => ({
   header: {
     padding: theme.spacing(1, 0, 1, 2),
     background: theme.palette.background.elevation2,
diff --git a/src/lib/Window/WindowSurface.tsx b/src/lib/Window/WindowSurface.tsx
index 701a767..a65e398 100644
--- a/src/lib/Window/WindowSurface.tsx
+++ b/src/lib/Window/WindowSurface.tsx
@@ -11,7 +11,7 @@ interface PropTypes {
 }
 
 
-const useStyles = makeStyles((theme: any) => ({
+const useStyles = makeStyles(theme => ({
   surface: {
     position: 'absolute',
     display: 'flex',