diff --git a/tasks/wkhtmltopdf.js b/tasks/wkhtmltopdf.js
index c28506c..6f6dc05 100644
--- a/tasks/wkhtmltopdf.js
+++ b/tasks/wkhtmltopdf.js
@@ -19,32 +19,53 @@ module.exports = function(grunt) {
   grunt.registerMultiTask('wkhtmltopdf', 'Your task description goes here.', function() {
 
     this.files.forEach(function(file) {
-      var srcpath = file.src.toString(),
-          dest = (file.dest && file.dest !== '') ? file.dest + '/' : '';
 
-      grunt.log.writeln("pdf output is: " + dest);
+      var pathlib = require('path');
+      // calculate the destination directory and ensure it exists, since
+      // wkhtmltopdf won't create the PDF if the destination directory doesn't
+      // exist
+      var destPath = file.dest;
+      if (grunt.file.isFile(file.dest)) {
+        destPath = pathlib.dirname(file.dest);
+      }
+      grunt.file.mkdir(destPath);
 
-      var dir = dest + srcpath.replace(/.*\/([^\/]+)\/[^\/]+\.html/, '$1');
+      file.src.forEach(function(src) {
 
-      // Create dest folder as wkhtmltopdf won't generate output if it doesn't exist
-      grunt.file.mkdir(dir);
-      var destpath  = dir + '/' +
-          srcpath.replace(/.*\/([^\/]+)\.html/, '$1.pdf');
-
-      // Launch PhantomJS.
-      helper.convert({
-        code: 90,
-        args: [
-            '--dpi', '96',        // workarround to wkhtmltopdf letter-spacing bug (see http://code.google.com/p/wkhtmltopdf/issues/detail?id=72)
-            '--print-media-type', // Use @print media type
-            srcpath,
-            destpath
-          ],
-        done: function(err) {
-          if (err) {
-            grunt.log('>>>', err);
-          }
+        var dest = file.dest;
+        // wkhtmltopdf seems to require that the destination be a file
+        // location, not a directory, so if the given destination is a
+        // directory then append the name of the source file but with the
+        // extension changed to .pdf
+        if (grunt.file.isDir(dest)) {
+          var srcFileName = pathlib.basename(src);
+          var srcFileExtension = pathlib.extname(src);
+          var destFileName = srcFileName.replace(
+            new RegExp(srcFileExtension + "$"), // match only the end of the string
+            ".pdf"
+          );
+          dest = pathlib.join(destPath + destFileName);
         }
+
+        grunt.log.writeln(
+          "Converting " + src + " -> " + dest
+        );
+
+        // Launch PhantomJS.
+        helper.convert({
+          code: 90,
+          args: [
+              '--dpi', '96',        // workarround to wkhtmltopdf letter-spacing bug (see http://code.google.com/p/wkhtmltopdf/issues/detail?id=72)
+              '--print-media-type', // Use @print media type
+              src,
+              dest
+            ],
+          done: function(err) {
+            if (err) {
+              grunt.log('>>>', err);
+            }
+          }
+        });
       });
     });
   });