diff --git a/lib/cachebust.js b/lib/cachebust.js
index b818ec7..a2d1deb 100644
--- a/lib/cachebust.js
+++ b/lib/cachebust.js
@@ -32,8 +32,13 @@ exports.busted = function(fileContents, options) {
 
   self.MD5 = function(fileContents, originalAttrValue, options) {
     var originalAttrValueWithoutCacheBusting = originalAttrValue.split("?")[0],
-        hash = MD5(fs.readFileSync(options.basePath + originalAttrValueWithoutCacheBusting).toString());
+        filePath = options.basePath + originalAttrValueWithoutCacheBusting;
 
+    if (!fs.existsSync(filePath)) {
+      return fileContents;
+    }
+
+    var hash = MD5(fs.readFileSync(filePath).toString());
     return fileContents.replace(originalAttrValue, originalAttrValueWithoutCacheBusting + '?v=' + hash);
   };
 
diff --git a/test/fixtures/default_options.html b/test/fixtures/default_options.html
index f845fae..a95357b 100644
--- a/test/fixtures/default_options.html
+++ b/test/fixtures/default_options.html
@@ -17,5 +17,6 @@
   <script src="http://best-cdn-ever.com/scripts/evenMoar.js"></script>
   <script src="//best-cdn-ever.com/scripts/anotherOne.js"></script>
   <script src="scripts/baz.js?v=3432243241413243143124132"</script>
+  <script src="scripts/missing.js"></script>
 </body>
 </html>