diff --git a/lib/marked.js b/lib/marked.js
index fd6189dd..6846bad0 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -11,10 +11,10 @@
 
 var block = {
   newline: /^\n+/,
-  code: /^ {4,}[^\n]*(?:\n {4,}[^\n]*|\n)*(?:\n+| *$)/,
-  gfm_code: /^ *``` *(\w+)? *\n([^\0]+?)\s*```(?: *\n+| *$)/,
+  code: /^ {4,}[^\n]*(?:\n {4,}[^\n]*|\n)*(?:\n+|$)/,
+  gfm_code: /^ *``` *(\w+)? *\n([^\0]+?)\s*``` *(?:\n+|$)/,
   hr: /^( *[\-*_]){3,} *(?:\n+|$)/,
-  heading: /^ *(#{1,6}) *([^\0]+?) *#* *(?:\n+|$)/,
+  heading: /^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,
   lheading: /^([^\n]+)\n *(=|-){3,} *\n*/,
   blockquote: /^( *>[^\n]+(\n[^\n]+)*)+\n*/,
   list: /^( *)([*+-]|\d+\.) [^\0]+?(?:\n{2,}(?! )|\s*$)(?!\1bullet)\n*/,