diff --git a/project.clj b/project.clj
index c6df85e..48090e3 100644
--- a/project.clj
+++ b/project.clj
@@ -4,7 +4,6 @@
                            [hiccup "1.0.0"]
                            [ring/ring-core "1.1.0"]
                            [cssgen "0.2.6"]
-                           [cheshire "4.0.0"]
                            [clj-redis "0.0.12"]
                            [org.pegdown/pegdown "1.1.0"]
                            [noir "1.3.0-beta1"]]
diff --git a/src/NoteHub/views/css.clj b/src/NoteHub/views/css.clj
index d33bc89..4ead6c0 100644
--- a/src/NoteHub/views/css.clj
+++ b/src/NoteHub/views/css.clj
@@ -185,5 +185,5 @@
             :border-bottom [:1px :dashed foreground-halftone]
             :margin-top :3em
             :margin-bottom :3em)
-      (rule "h1, h2, h3, h4" 
+      (rule "h1, h2, h3, h4, h5, h6" 
             :font-family header-fonts))))
diff --git a/src/NoteHub/views/pages.clj b/src/NoteHub/views/pages.clj
index 3d6955c..5e2cab5 100644
--- a/src/NoteHub/views/pages.clj
+++ b/src/NoteHub/views/pages.clj
@@ -6,14 +6,13 @@
     [NoteHub.settings]
     [NoteHub.views.common]
     [clojure.string :rename {replace sreplace}
-      :only [split replace blank? split-lines lower-case]]
+      :only [escape split replace blank? split-lines lower-case]]
     [clojure.core.incubator :only [-?>]]
     [hiccup.form]
     [hiccup.core]
     [hiccup.element]
     [noir.response :only [redirect status content-type]]
     [noir.core :only [defpage defpartial]]
-    [cheshire.core]
     [noir.statuses])
   (:import 
     [java.util Calendar]
@@ -67,8 +66,7 @@
 ; This function answers to an AJAX request: it gets a session key and a markdown text.
 ; It returns the html code of the provided markdown and a new session key.
 (defpage [:post "/preview"] {:keys [session-key draft]}
-         (generate-string
-           {:preview (md-to-html draft)}))
+  (str "{ preview: " (escape (md-to-html draft) {\" "\\\""}) "}"))
 
 ; Landing Page
 (defpage "/" {}