diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d00304..74bc185 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+4.5.0 / WIP
+------------------
+
+- Keep tabs (don't replace with spaces)
+- Don't wrap iframes with paragraphs (according to spec update).
+
+
 4.4.0 / 2015-07-18
 ------------------
 
diff --git a/lib/common/html_blocks.js b/lib/common/html_blocks.js
index d13c17d..515fb00 100644
--- a/lib/common/html_blocks.js
+++ b/lib/common/html_blocks.js
@@ -35,6 +35,7 @@ module.exports = [
   'header',
   'hr',
   'html',
+  'iframe',
   'legend',
   'li',
   'link',