diff --git a/mr-image-resize.php b/mr-image-resize.php
index 4fe5933..dd3a62f 100644
--- a/mr-image-resize.php
+++ b/mr-image-resize.php
@@ -116,7 +116,9 @@ function mr_image_resize($url, $width=null, $height=null, $crop=true, $align='c'
       $metadata = wp_get_attachment_metadata($get_attachment[0]->ID);
       if (isset($metadata['image_meta'])) {
         $md = $saved['width'] . 'x' . $saved['height'];
-        if ($crop) $md .= ($align) ? "_${align}" : "_c";
+        if ($crop) {
+          $md .= ($align) ? '_' . $align : '_c';
+        }
         $metadata['image_meta']['resized_images'][] = $md;
         wp_update_attachment_metadata($get_attachment[0]->ID, $metadata);
       }
@@ -203,15 +205,15 @@ function mr_common_info($url, $width, $height, $crop, $align, $retina) {
   $name = wp_basename($file_path, ".$ext");
 
   // Suffix applied to filename
-  $suffix = "${dest_width}x${dest_height}";
+  $suffix = $dest_width . 'x' . $dest_height;
 
   // Set align info on file
   if ($crop) {
-    $suffix .= ($align) ? "_${align}" : "_c";
+    $suffix .= ($align) ? '_' . $align : '_c';
   }
 
   // Get the destination file name
-  $dest_file_name = "${dir}/${name}-${suffix}.${ext}";
+  $dest_file_name = $dir . '/' . $name . '-' . $suffix . '.' . $ext;
   
   // Return info
   return array(
@@ -258,4 +260,4 @@ function mr_delete_resized_images($post_id) {
 
   }
 
-}
\ No newline at end of file
+}