diff --git a/src-next/slider/index.less b/src-next/slider/index.less
index 6919ffe0c..28d51adc8 100644
--- a/src-next/slider/index.less
+++ b/src-next/slider/index.less
@@ -24,7 +24,7 @@
     height: 100%;
     background-color: @slider-active-background-color;
     border-radius: inherit;
-    transition: width @animation-duration-fast;
+    transition: width @animation-duration-fast, height @animation-duration-fast;
   }
 
   &__button {