diff --git a/Parsedown.php b/Parsedown.php
index 763199e..72719a0 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -548,7 +548,7 @@ class Parsedown
         {
             $Block['li']['text'] []= '';
 
-            $text = preg_replace('/^[ ]{0,2}/', '', $Line['body']);
+            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
 
             $Block['li']['text'] []= $text;
 
diff --git a/test/data/separated_nested_list.html b/test/data/separated_nested_list.html
new file mode 100644
index 0000000..80a5cae
--- /dev/null
+++ b/test/data/separated_nested_list.html
@@ -0,0 +1,9 @@
+<ul>
+<li>
+<p>li</p>
+<ul>
+<li>li</li>
+<li>li</li>
+</ul>
+</li>
+</ul>
\ No newline at end of file
diff --git a/test/data/separated_nested_list.md b/test/data/separated_nested_list.md
new file mode 100644
index 0000000..d7cd1af
--- /dev/null
+++ b/test/data/separated_nested_list.md
@@ -0,0 +1,4 @@
+- li
+
+    - li
+    - li
\ No newline at end of file