diff --git a/data/templates/atom-item.xml b/data/templates/atom-item.xml
--- a/data/templates/atom-item.xml
+++ b/data/templates/atom-item.xml
@@ -3,5 +3,5 @@
     <link href="$absolute/$url" />
     <id>$absolute/$url</id>
     <updated>$timestamp</updated>
-    <summary>$description</summary>
+    <summary type="html"><![CDATA[$description]]></summary>
 </entry>
diff --git a/hakyll.cabal b/hakyll.cabal
--- a/hakyll.cabal
+++ b/hakyll.cabal
@@ -1,5 +1,5 @@
 Name:               hakyll
-Version:            2.4.1
+Version:            2.4.2
 
 Synopsis:           A simple static site generator library.
 Description:        A simple static site generator library, mainly aimed at
@@ -41,7 +41,7 @@
                     time >= 1.1,
                     binary >= 0.5,
                     hamlet >= 0.4.2,
-                    blaze-html >= 0.2 && <= 0.3
+                    blaze-html >= 0.4
   exposed-modules:  Network.Hakyll.SimpleServer
                     Text.Hakyll
                     Text.Hakyll.Context