diff --git a/types/rc-slider/README.md b/types/rc-slider/README.md
index 6c56f6c2e1..10c7dec387 100644
--- a/types/rc-slider/README.md
+++ b/types/rc-slider/README.md
@@ -5,7 +5,7 @@
 This package contains type definitions for rc-slider (https://github.com/react-component/slider).
 
 Additional Details
- * Last updated: Fri, 15 Dec 2017
+ * Last updated: Sun, 04 Aug 2018
  * Dependencies: react
  * Global values: none
 
diff --git a/types/rc-slider/index.d.ts b/types/rc-slider/index.d.ts
index 707f5425c5..420d836034 100644
--- a/types/rc-slider/index.d.ts
+++ b/types/rc-slider/index.d.ts
@@ -1,9 +1,10 @@
-// Type definitions for rc-slider 8.2
+// Type definitions for rc-slider 8.6
 // Project: https://github.com/react-component/slider
 // Definitions by: Marcinkus Mantas <https://github.com/mantasmarcinkus>
 //                 Alexander Mattoni <https://github.com/mattoni>
 //                 Austin Turner <https://github.com/paustint>
 //                 Jacob Froman <https://github.com/j-fro>
+//                 Deanna Veale <https://github.com/Deanna2>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -68,18 +69,6 @@ export interface CommonApiProps {
      *  @default false
      */
     dots?: boolean;
-    /**
-     * onBeforeChange will be triggered when ontouchstart or onmousedown is triggered.
-     */
-    onBeforeChange?(value: any): any | undefined;
-    /**
-     * onChange will be triggered while the value of Slider changing.
-     */
-    onChange?(value: any): any | undefined;
-    /**
-     * onAfterChange will be triggered when ontouchend or onmouseup is triggered.
-     */
-    onAfterChange?(value: any): any | undefined;
 
     /**
      * @deprecated in version ^6.0.0. Use rc-tooltip
@@ -125,6 +114,18 @@ export interface CommonApiProps {
 }
 
 export interface SliderProps extends CommonApiProps {
+    /**
+     * onBeforeChange will be triggered when ontouchstart or onmousedown is triggered.
+     */
+    onBeforeChange?(value: number): void;
+    /**
+     * onChange will be triggered while the value of Slider changing.
+     */
+    onChange?(value: number): void;
+    /**
+     * onAfterChange will be triggered when ontouchend or onmouseup is triggered.
+     */
+    onAfterChange?(value: number): void;
     /**
      * Set initial value of slider.
      *  @default 0
@@ -137,6 +138,21 @@ export interface SliderProps extends CommonApiProps {
 }
 
 export interface RangeProps extends CommonApiProps {
+    /**
+     * onBeforeChange will be triggered when ontouchstart or onmousedown is triggered.
+     * For prop (count = -1) type returned is [number, undefined]. Bug raised in rc-slider https://github.com/react-component/slider/issues/457
+     */
+    onBeforeChange?(value: number[]): void;
+    /**
+     * onChange will be triggered while the value of Slider changing.
+     * For prop (count = -1) type returned is [number, undefined]. Bug raised in rc-slider https://github.com/react-component/slider/issues/457
+     */
+    onChange?(value: number[]): void;
+    /**
+     * onAfterChange will be triggered when ontouchend or onmouseup is triggered.
+     * For prop (count = -1) type returned is [number, undefined]. Bug raised in rc-slider https://github.com/react-component/slider/issues/457
+     */
+    onAfterChange?(value: number[]): void;
     /**
      * Set initial positions of handles.
      *  @default [0,0]
diff --git a/types/rc-slider/rc-slider-tests.tsx b/types/rc-slider/rc-slider-tests.tsx
index 2de87bc4e2..5b246dd7ab 100644
--- a/types/rc-slider/rc-slider-tests.tsx
+++ b/types/rc-slider/rc-slider-tests.tsx
@@ -18,6 +18,11 @@ ReactDOM.render(
     />,
     document.querySelector('.another-app')
 );
+
+const onChangeFunc1 = (string: number) => {};
+
+const onChangeFunc2 = (string: number[]) => {};
+
 ReactDOM.render(
     <Slider
         className="bottomRight"
@@ -30,9 +35,9 @@ ReactDOM.render(
         included={true}
         disabled={false}
         dots={true}
-        onBeforeChange={() => { }}
-        onChange={() => { }}
-        onAfterChange={() => { }}
+        onBeforeChange={onChangeFunc1}
+        onChange={onChangeFunc1}
+        onAfterChange={onChangeFunc1}
         defaultValue={0.1}
         value={0.1}
         style={{backgroundColor: 'plum'}}
@@ -49,6 +54,9 @@ ReactDOM.render(
         count={3}
         allowCross={false}
         pushable={true}
+        onChange={onChangeFunc2}
+        onAfterChange={onChangeFunc2}
+        onBeforeChange={onChangeFunc2}
     />,
     document.querySelector('.app')
 );