diff --git a/js/load-image-scale.js b/js/load-image-scale.js
index c5e381e..e91deb2 100644
--- a/js/load-image-scale.js
+++ b/js/load-image-scale.js
@@ -58,6 +58,7 @@
   // gets img, options, data passed as arguments:
   loadImage.getTransformedOptions = function (img, options) {
     var aspectRatio = options.aspectRatio
+    var portraitAspectRatio = options.portraitAspectRatio
     var newOptions
     var i
     var width
@@ -74,12 +75,22 @@
     newOptions.crop = true
     width = img.naturalWidth || img.width
     height = img.naturalHeight || img.height
-    if (width / height > aspectRatio) {
-      newOptions.maxWidth = height * aspectRatio
-      newOptions.maxHeight = height
+    if (portraitAspectRatio && height > width) {
+      if (height / width > portraitAspectRatio) {
+        newOptions.maxWidth = height
+        newOptions.maxHeight = height / portraitAspectRatio
+      } else {
+        newOptions.maxWidth = width * portraitAspectRatio
+        newOptions.maxHeight = width
+      }
     } else {
-      newOptions.maxWidth = width
-      newOptions.maxHeight = width / aspectRatio
+      if (width / height > aspectRatio) {
+        newOptions.maxWidth = height * aspectRatio
+        newOptions.maxHeight = height
+      } else {
+        newOptions.maxWidth = width
+        newOptions.maxHeight = width / aspectRatio
+      }
     }
     return newOptions
   }