diff --git a/lib/imgkit/source.rb b/lib/imgkit/source.rb
index 9340036..eaaf0d6 100644
--- a/lib/imgkit/source.rb
+++ b/lib/imgkit/source.rb
@@ -19,9 +19,20 @@ def html?
     end
     
     def to_s
-      file? ? @source.path : @source
+      if file?
+        @source.path
+      elsif url?
+        escaped_url
+      else
+        @source
+      end
+    end
+
+    private
+
+    def escaped_url
+      @source.gsub '&', '\\\\&'
     end
-    
   end
   
-end
+end
\ No newline at end of file
diff --git a/spec/imgkit_spec.rb b/spec/imgkit_spec.rb
index 575887d..fce1550 100644
--- a/spec/imgkit_spec.rb
+++ b/spec/imgkit_spec.rb
@@ -14,6 +14,12 @@
       imgkit.source.to_s.should == 'http://google.com'
     end
 
+    it "should accept a URL as the source with ampersand and scape the ampersand" do
+      imgkit = IMGKit.new('http://google.com?something=1&anotherthing=2')
+      imgkit.source.should be_url
+      imgkit.source.to_s.should == 'http://google.com?something=1\&anotherthing=2'
+    end
+
     it "should accept a File as the source" do
       file_path = File.join(SPEC_ROOT,'fixtures','example.html')
       imgkit = IMGKit.new(File.new(file_path))