diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -173,7 +173,7 @@ class PostManager(models.Manager):
         """
 
         for key, value in PREPARSE_PATTERNS.items():
-            text = re.sub(key, value, text)
+            text = re.sub(key, value, text, flags=re.MULTILINE)
 
         return text
 
diff --git a/boards/tests/test_parser.py b/boards/tests/test_parser.py
--- a/boards/tests/test_parser.py
+++ b/boards/tests/test_parser.py
@@ -4,8 +4,9 @@ from boards.models import Post
 
 class ParserTest(TestCase):
     def test_preparse_quote(self):
-        raw_text = '>quote'
+        raw_text = '>quote\nQuote in >line\nLine\n>Quote'
         preparsed_text = Post.objects._preparse_text(raw_text)
 
-        self.assertEqual('[quote]quote[/quote]', preparsed_text,
-                         'Quote not preparsed.')
\ No newline at end of file
+        self.assertEqual(
+            '[quote]quote[/quote]\nQuote in >line\nLine\n[quote]Quote[/quote]',
+            preparsed_text, 'Quote not preparsed.')
\ No newline at end of file