diff --git a/lib/blocks.js b/lib/blocks.js
index f5f64f92..0a9a7cf9 100644
--- a/lib/blocks.js
+++ b/lib/blocks.js
@@ -137,6 +137,9 @@ var parseListMarker = function(parser, container) {
                  delimiter: null,
                  padding: null,
                  markerOffset: parser.indent };
+    if (parser.indent >= 4) {
+        return null;
+    }
     if ((match = rest.match(reBulletListMarker))) {
         data.type = 'bullet';
         data.bulletChar = match[0][0];