diff --git a/lib/scalingUtils.js b/lib/scalingUtils.js
index 24aa2f7..ba45ffe 100644
--- a/lib/scalingUtils.js
+++ b/lib/scalingUtils.js
@@ -1,12 +1,13 @@
 import { Dimensions } from 'react-native';
 const { width, height } = Dimensions.get('window');
+const [w, h] = width > height ? [height, width] : [width, height];
 
 //Guideline sizes are based on standard ~5" screen mobile device
 const guidelineBaseWidth = 350;
 const guidelineBaseHeight = 680;
 
-const scale = size => width / guidelineBaseWidth * size;
-const verticalScale = size => height / guidelineBaseHeight * size;
+const scale = size => w / guidelineBaseWidth * size;
+const verticalScale = size => h / guidelineBaseHeight * size;
 const moderateScale = (size, factor = 0.5) => size + ( scale(size) - size ) * factor;
 
 export {scale, verticalScale, moderateScale};
\ No newline at end of file