diff --git a/lib/utils/control.ts b/lib/utils/control.ts
index f0dec89..c71acd1 100644
--- a/lib/utils/control.ts
+++ b/lib/utils/control.ts
@@ -1,5 +1,5 @@
 import Decimal from './decimal'
-import {
+import type {
   Value,
   Mark,
   MarkOption,
diff --git a/lib/utils/index.ts b/lib/utils/index.ts
index 32a5f0c..9c18cd7 100644
--- a/lib/utils/index.ts
+++ b/lib/utils/index.ts
@@ -1,4 +1,4 @@
-import { Direction } from '../typings'
+import type { Direction } from '../typings'
 
 interface IPosObject {
   x: number
diff --git a/lib/vue-slider-dot.tsx b/lib/vue-slider-dot.tsx
index 692c7e7..9222ace 100644
--- a/lib/vue-slider-dot.tsx
+++ b/lib/vue-slider-dot.tsx
@@ -1,5 +1,5 @@
 import { Component, Prop, Vue } from 'vue-property-decorator'
-import { Value, Styles, Position, TooltipProp, TooltipFormatter } from './typings'
+import type { Value, Styles, Position, TooltipProp, TooltipFormatter } from './typings'
 
 import './styles/dot.scss'
 
diff --git a/lib/vue-slider-mark.tsx b/lib/vue-slider-mark.tsx
index 94e4962..762da21 100644
--- a/lib/vue-slider-mark.tsx
+++ b/lib/vue-slider-mark.tsx
@@ -1,5 +1,5 @@
 import { Component, Prop, Vue } from 'vue-property-decorator'
-import { Mark, Styles } from './typings'
+import type { Mark, Styles } from './typings'
 
 import './styles/mark.scss'
 
diff --git a/lib/vue-slider.tsx b/lib/vue-slider.tsx
index 87faac4..aabf7fe 100644
--- a/lib/vue-slider.tsx
+++ b/lib/vue-slider.tsx
@@ -1,5 +1,5 @@
 import { Component, Model, Prop, Watch, Vue } from 'vue-property-decorator'
-import {
+import type {
   Value,
   DataObject,
   Mark,
@@ -19,10 +19,10 @@ import {
 import VueSliderDot from './vue-slider-dot'
 import VueSliderMark from './vue-slider-mark'
 
-import { getSize, getPos, getKeyboardHandleFunc, HandleFunction } from './utils'
+import { getSize, getPos, getKeyboardHandleFunc, type HandleFunction } from './utils'
 import Decimal from './utils/decimal'
 import Control, { ERROR_TYPE } from './utils/control'
-import State, { StateMap } from './utils/state'
+import State, { type StateMap } from './utils/state'
 
 import './styles/slider.scss'