diff --git a/index.js b/index.js
index d61a233c..8d7e3530 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,4 @@
-// Generated by CoffeeScript 2.2.2
+// Generated by CoffeeScript 2.3.0
 (function() {
   module.exports = require("./lib");
 
diff --git a/lib/index.coffee b/lib/index.coffee
index 6d0a3ab4..2dcfb7d2 100644
--- a/lib/index.coffee
+++ b/lib/index.coffee
@@ -136,17 +136,19 @@ class EPub
             $(that).replaceWith($("<div>" + child + "</div>"))
 
       $("img").each (index, elem)->
-        url = $(elem).attr("src")
-        if image = self.options.images.find((element) -> element.url == url)
-          id = image.id
-          extension = image.extension
+        if url = $(elem).attr("src")
+          if image = self.options.images.find((element) -> element.url == url)
+            id = image.id
+            extension = image.extension
+          else
+            id = uuid()
+            mediaType = mime.getType url.replace /\?.*/, ""
+            extension = mime.getExtension mediaType
+            dir = content.dir
+            self.options.images.push {id, url, dir, mediaType, extension}
+          $(elem).attr("src", "images/#{id}.#{extension}")
         else
-          id = uuid()
-          mediaType = mime.getType url.replace /\?.*/, ""
-          extension = mime.getExtension mediaType
-          dir = content.dir
-          self.options.images.push {id, url, dir, mediaType, extension}
-        $(elem).attr("src", "images/#{id}.#{extension}")
+          $(elem).remove()
       content.data = $.xml()
       content
 
diff --git a/lib/index.js b/lib/index.js
index b2579622..c9930872 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,4 +1,4 @@
-// Generated by CoffeeScript 2.2.2
+// Generated by CoffeeScript 2.3.0
 (function() {
   var EPub, Q, _, archiver, cheerio, ejs, entities, fs, fsextra, mime, path, removeDiacritics, request, rimraf, uslug, uuid,
     indexOf = [].indexOf;
@@ -158,20 +158,23 @@
         });
         $("img").each(function(index, elem) {
           var dir, extension, id, image, mediaType, url;
-          url = $(elem).attr("src");
-          if (image = self.options.images.find(function(element) {
-            return element.url === url;
-          })) {
-            id = image.id;
-            extension = image.extension;
+          if (url = $(elem).attr("src")) {
+            if (image = self.options.images.find(function(element) {
+              return element.url === url;
+            })) {
+              id = image.id;
+              extension = image.extension;
+            } else {
+              id = uuid();
+              mediaType = mime.getType(url.replace(/\?.*/, ""));
+              extension = mime.getExtension(mediaType);
+              dir = content.dir;
+              self.options.images.push({id, url, dir, mediaType, extension});
+            }
+            return $(elem).attr("src", `images/${id}.${extension}`);
           } else {
-            id = uuid();
-            mediaType = mime.getType(url.replace(/\?.*/, ""));
-            extension = mime.getExtension(mediaType);
-            dir = content.dir;
-            self.options.images.push({id, url, dir, mediaType, extension});
+            return $(elem).remove();
           }
-          return $(elem).attr("src", `images/${id}.${extension}`);
         });
         content.data = $.xml();
         return content;
diff --git a/package-lock.json b/package-lock.json
index 85877eaa..36ede89f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -101,6 +101,12 @@
         "lodash.some": "4.6.0"
       }
     },
+    "coffeescript": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/coffeescript/-/coffeescript-2.3.0.tgz",
+      "integrity": "sha512-M1AINTgv6EvFAK92LeaYdHUzsTE+j97kBQyLHjfnMz1jh21rJMjdTe471Zgs+qK7Tavpbh5e4pP2VxcRTFxm9A==",
+      "dev": true
+    },
     "combined-stream": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
diff --git a/package.json b/package.json
index 0b34f1be..08a1f15b 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
   "description": "A library to generate EPUB from HTML",
   "main": "index.js",
   "scripts": {
-    "test": "node test"
+    "test": "node test",
+    "compile": "coffee -c ."
   },
   "repository": {
     "type": "git",
@@ -36,5 +37,8 @@
     "superagent": "^3.8.2",
     "underscore": "^1.8.3",
     "uslug": "^1.0.4"
+  },
+  "devDependencies": {
+    "coffeescript": "^2.3.0"
   }
 }
diff --git a/test.js b/test.js
index a08a8f0a..3df5078c 100644
--- a/test.js
+++ b/test.js
@@ -1,4 +1,4 @@
-// Generated by CoffeeScript 2.2.2
+// Generated by CoffeeScript 2.3.0
 (function() {
   var EPub, optionsAlice, optionsHtmlPaste, path;