diff --git a/package.json b/package.json
index 8c85811..6ad9b83 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "react-native": "*",
     "ts-jest": "^24.0.2",
     "prettier": "^1.18.2",
-    "typescript": "^3.8.0"
+    "typescript": "^5.9.3"
   },
   "peerDependencies": {
     "react": "*",
diff --git a/src/block.tsx b/src/block.tsx
index 6b2927f..c727dcf 100644
--- a/src/block.tsx
+++ b/src/block.tsx
@@ -13,11 +13,11 @@ import { FunctionComponent } from 'react'
 interface BlockProps {
   style?: StyleProp<any>
   dragStartAnimationStyle: StyleProp<any>
-  onPress?: () => void
+  onPress: () => void
   onLongPress: () => void
   panHandlers: GestureResponderHandlers
-  delayLongPress:number
-  children?:React.ReactNode
+  delayLongPress: number
+  children?: React.ReactNode
 }
 
 export const Block: FunctionComponent<BlockProps> = ({
@@ -27,12 +27,15 @@ export const Block: FunctionComponent<BlockProps> = ({
   onLongPress,
   children,
   panHandlers,
-  delayLongPress
+  delayLongPress,
 }) => {
   return (
     <Animated.View style={[styles.blockContainer, style, dragStartAnimationStyle]} {...panHandlers}>
       <Animated.View>
-        <TouchableWithoutFeedback delayLongPress={delayLongPress} onPress={onPress} onLongPress={onLongPress}>
+        <TouchableWithoutFeedback
+          delayLongPress={delayLongPress}
+          onPress={onPress}
+          onLongPress={onLongPress}>
           {children}
         </TouchableWithoutFeedback>
       </Animated.View>
diff --git a/src/draggable-grid.tsx b/src/draggable-grid.tsx
index 213e515..18c6ee2 100644
--- a/src/draggable-grid.tsx
+++ b/src/draggable-grid.tsx
@@ -1,3 +1,5 @@
+/** @format */
+
 import * as React from 'react'
 import { useState, useEffect } from 'react'
 import {
@@ -9,7 +11,7 @@ import {
   PanResponderGestureState,
   ViewStyle,
   Platform,
-  I18nManager
+  I18nManager,
 } from 'react-native'
 import { Block } from './block'
 import { findKey, findIndex, differenceBy } from './utils'
@@ -122,14 +124,14 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
     gridHeight.setValue(rowCount * blockHeight)
   }
   function onBlockPress(itemIndex: number) {
-    props.onItemPress && props.onItemPress(items[itemIndex].itemData)
+    props.onItemPress && props.onItemPress(items[itemIndex]!.itemData)
   }
   function onStartDrag(_: GestureResponderEvent, gestureState: PanResponderGestureState) {
     const activeItem = getActiveItem()
-    if (!activeItem) return false
+    if (!activeItem) return
     props.onDragStart && props.onDragStart(activeItem.itemData)
     const { x0, y0, moveX, moveY } = gestureState
-    const activeOrigin = blockPositions[orderMap[activeItem.key].order]
+    const activeOrigin = blockPositions[orderMap[activeItem.key]!.order]!
     const x = activeOrigin.x + (I18nManager.isRTL ? x0 : -x0)
     const y = activeOrigin.y - y0
     activeItem.currentPosition.setOffset({
@@ -147,8 +149,8 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
   }
   function onHandMove(_: GestureResponderEvent, gestureState: PanResponderGestureState) {
     const activeItem = getActiveItem()
-    if (!activeItem) return false
-    const { moveX:moveXOriginal, moveY } = gestureState
+    if (!activeItem) return
+    const { moveX: moveXOriginal, moveY } = gestureState
     const moveX = I18nManager.isRTL ? -moveXOriginal : moveXOriginal
     props.onDragging && props.onDragging(gestureState)
 
@@ -159,7 +161,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
       x: moveX - xChokeAmount - xMinChokeAmount,
       y: moveY,
     }
-    const originPosition = blockPositions[orderMap[activeItem.key].order]
+    const originPosition = blockPositions[orderMap[activeItem.key]!.order]!
     const dragPositionToActivePositionDistance = getDistance(dragPosition, originPosition)
     activeItem.currentPosition.setValue(dragPosition)
 
@@ -171,7 +173,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
       if (index != activeItemIndex) {
         const dragPositionToItemPositionDistance = getDistance(
           dragPosition,
-          blockPositions[orderMap[item.key].order],
+          blockPositions[orderMap[item.key]!.order]!,
         )
         if (
           dragPositionToItemPositionDistance < closetDistance &&
@@ -183,15 +185,15 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
       }
     })
     if (activeItemIndex != closetItemIndex) {
-      const closetOrder = orderMap[items[closetItemIndex].key].order
-      resetBlockPositionByOrder(orderMap[activeItem.key].order, closetOrder)
-      orderMap[activeItem.key].order = closetOrder
+      const closetOrder = orderMap[items[closetItemIndex]!.key]!.order
+      resetBlockPositionByOrder(orderMap[activeItem.key]!.order, closetOrder)
+      orderMap[activeItem.key]!.order = closetOrder
       props.onResetSort && props.onResetSort(getSortData())
     }
   }
   function onHandRelease() {
     const activeItem = getActiveItem()
-    if (!activeItem) return false
+    if (!activeItem) return
     props.onDragRelease && props.onDragRelease(getSortData())
     setPanResponderCapture(false)
     activeItem.currentPosition.flattenOffset()
@@ -207,7 +209,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
         if (item && item.disabledReSorted) {
           disabledReSortedItemCount++
         } else {
-          orderMap[key].order += disabledReSortedItemCount + 1
+          orderMap[key]!.order += disabledReSortedItemCount + 1
           disabledReSortedItemCount = 0
           moveBlockToBlockOrderPosition(key)
         }
@@ -219,7 +221,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
         if (item && item.disabledReSorted) {
           disabledReSortedItemCount++
         } else {
-          orderMap[key].order -= disabledReSortedItemCount + 1
+          orderMap[key]!.order -= disabledReSortedItemCount + 1
           disabledReSortedItemCount = 0
           moveBlockToBlockOrderPosition(key)
         }
@@ -228,9 +230,9 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
   }
   function moveBlockToBlockOrderPosition(itemKey: string | number) {
     const itemIndex = findIndex(items, item => `${item.key}` === `${itemKey}`)
-    items[itemIndex].currentPosition.flattenOffset()
-    Animated.timing(items[itemIndex].currentPosition, {
-      toValue: blockPositions[orderMap[itemKey].order],
+    items[itemIndex]!.currentPosition.flattenOffset()
+    Animated.timing(items[itemIndex]!.currentPosition, {
+      toValue: blockPositions[orderMap[itemKey]!.order]!,
       duration: 200,
       useNativeDriver: false,
     }).start()
@@ -242,7 +244,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
   function getSortData() {
     const sortData: DataType[] = []
     items.forEach(item => {
-      sortData[orderMap[item.key].order] = item.itemData
+      sortData[orderMap[item.key]!.order] = item.itemData
     })
     return sortData
   }
@@ -279,10 +281,16 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
         width: blockWidth,
         height: blockHeight,
         position: 'absolute',
-        top: items[itemIndex].currentPosition.getLayout().top,
-        left: I18nManager.isRTL && Platform.OS === 'web' ? undefined: items[itemIndex].currentPosition.getLayout().left,
-        right: I18nManager.isRTL && Platform.OS === 'web' ? items[itemIndex].currentPosition.getLayout().left : undefined,
-},
+        top: items[itemIndex]!.currentPosition.getLayout()['top'],
+        left:
+          I18nManager.isRTL && Platform.OS === 'web'
+            ? undefined
+            : items[itemIndex]!.currentPosition.getLayout()['left'],
+        right:
+          I18nManager.isRTL && Platform.OS === 'web'
+            ? items[itemIndex]!.currentPosition.getLayout()['left']
+            : undefined,
+      },
     ]
   }
   function getDragStartAnimation(itemIndex: number) {
@@ -338,8 +346,8 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
   function diffData() {
     props.data.forEach((item, index) => {
       if (orderMap[item.key]) {
-        if (orderMap[item.key].order != index) {
-          orderMap[item.key].order = index
+        if (orderMap[item.key]!.order != index) {
+          orderMap[item.key]!.order = index
           moveBlockToBlockOrderPosition(item.key)
         }
         const currentItem = items.find(i => i.key === item.key)
@@ -380,7 +388,7 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
         dragStartAnimationStyle={getDragStartAnimation(itemIndex)}
         delayLongPress={props.delayLongPress || 300}
         key={item.key}>
-        {props.renderItem(item.itemData, orderMap[item.key].order)}
+        {props.renderItem(item.itemData, orderMap[item.key]!.order)}
       </Block>
     )
   })
diff --git a/src/utils.ts b/src/utils.ts
index c865163..c3a3457 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,15 +1,18 @@
-function findKey<T>(map: { [key: string]: T }, fn: (item: T) => boolean) {
+/** @format */
+
+function findKey<T>(map: { [key: string]: T }, fn: (item: T) => boolean): string | undefined {
   const keys = Object.keys(map)
   for (let i = 0; i < keys.length; i++) {
-    if (fn(map[keys[i]])) {
+    if (fn(map[keys[i]!]!)) {
       return keys[i]
     }
   }
+  return undefined
 }
 
 function findIndex<T>(arr: T[], fn: (item: T) => boolean) {
   for (let i = 0; i < arr.length; i++) {
-    if (fn(arr[i])) {
+    if (fn(arr[i]!)) {
       return i
     }
   }
diff --git a/tsconfig.json b/tsconfig.json
index 9bcd0c5..0dd991a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,15 @@
 {
   "compilerOptions": {
     "module": "commonjs",
+    "noUncheckedSideEffectImports": true,
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+    "noImplicitReturns": true,
+    "noImplicitOverride": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noPropertyAccessFromIndexSignature": true,
     "strict": true,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
diff --git a/yarn.lock b/yarn.lock
index f87d7b7..13a2a00 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5815,10 +5815,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "http://registry.npm.taobao.org/typedarray/download/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^3.8.0:
-  version "3.9.10"
-  resolved "https://npm.corp.kuaishou.com/typescript/-/typescript-3.9.10.tgz#70f3910ac7a51ed6bef79da7800690b19bf778b8"
-  integrity sha1-cPORCselHta+952ngAaQsZv3eLg=
+typescript@^5.9.3:
+  version "5.9.3"
+  resolved "http://registry.npm.taobao.org/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 ua-parser-js@^0.7.18:
   version "0.7.18"