diff --git a/src/Slider.jsx b/src/Slider.jsx
index 3078a50..22919bc 100644
--- a/src/Slider.jsx
+++ b/src/Slider.jsx
@@ -46,13 +46,7 @@ class Slider extends React.Component {
 
     let recent;
     if (props.range && upperBound === lowerBound) {
-      if (lowerBound === max) {
-        recent = 'lowerBound';
-      } else if (upperBound === min) {
-        recent = 'upperBound';
-      } else {
-        recent = 'upperBound';
-      }
+      recent = lowerBound === max ? 'lowerBound' : 'upperBound';
     } else {
       recent = 'upperBound';
     }
diff --git a/src/Steps.jsx b/src/Steps.jsx
index 5b7a2b5..208f10a 100644
--- a/src/Steps.jsx
+++ b/src/Steps.jsx
@@ -3,7 +3,7 @@ import classNames from 'classnames';
 import warning from 'warning';
 
 function calcPoints(vertical, marks, dots, step, min, max) {
-  warning(dots ? step : true, '`Slider[step]` should be a positive number in order to make Slider[dots] work.');
+  warning(dots ? step > 0 : true, '`Slider[step]` should be a positive number in order to make Slider[dots] work.');
   const points = Object.keys(marks).map(parseFloat);
   if (dots) {
     for (let i = min; i <= max; i = i + step) {