diff --git a/README.rst b/README.rst
index f23ed58..fa087c4 100644
--- a/README.rst
+++ b/README.rst
@@ -97,6 +97,9 @@ Settings
 ``LESS_EXECUTABLE``
     Path to LESS compiler executable. Default: ``"lessc"``.
 
+``LESS_OPTIONS``
+    Options sent to ``lessc``. Default: ``[]``.
+
 ``LESS_ROOT``
     Controls the absolute file path that compiled files will be written to. Default: ``STATIC_ROOT``.
 
diff --git a/less/settings.py b/less/settings.py
index dbc4956..93f7294 100644
--- a/less/settings.py
+++ b/less/settings.py
@@ -7,6 +7,7 @@
 LESS_MTIME_DELAY = getattr(settings, "LESS_MTIME_DELAY", 10) # 10 seconds
 LESS_ROOT = getattr(settings, "LESS_ROOT", getattr(settings, "STATIC_ROOT", getattr(settings, "MEDIA_ROOT")))
 LESS_OUTPUT_DIR = getattr(settings, "LESS_OUTPUT_DIR", "LESS_CACHE")
+LESS_OPTIONS = getattr(settings, "LESS_OPTIONS", [])
 LESS_DEVMODE = getattr(settings, "LESS_DEVMODE", False)
 LESS_DEVMODE_WATCH_DIRS = getattr(settings, "LESS_DEVMODE_WATCH_DIRS", [settings.STATIC_ROOT])
 LESS_DEVMODE_EXCLUDE = getattr(settings, "LESS_DEVMODE_EXCLUDE", ())
diff --git a/less/utils.py b/less/utils.py
index 4b56323..fc3d058 100644
--- a/less/utils.py
+++ b/less/utils.py
@@ -1,8 +1,9 @@
 from less import LessException
-from less.settings import LESS_EXECUTABLE, LESS_ROOT, LESS_OUTPUT_DIR
+from less.settings import LESS_EXECUTABLE, LESS_ROOT, LESS_OUTPUT_DIR, \
+        LESS_OPTIONS
 from django.conf import settings
 import logging
-import posixpath
+import urlparse
 import re
 import os
 import subprocess
@@ -21,14 +22,15 @@ class URLConverter(object):
     def __init__(self, content, source_path):
         self.content = content
         self.source_dir = os.path.dirname(source_path)
+        if not self.source_dir.endswith('/'):
+            self.source_dir = self.source_dir + '/'
 
     def convert_url(self, matchobj):
         url = matchobj.group(1)
         url = url.strip(' \'"')
         if url.startswith(('http://', 'https://', '/', 'data:')):
             return "url('%s')" % url
-        full_url = posixpath.normpath("/".join([self.source_dir, url]))
-        return "url('%s')" % full_url
+        return "url('%s')" % urlparse.urljoin(self.source_dir, url)
 
     def convert(self):
         return self.URL_PATTERN.sub(self.convert_url, self.content)
@@ -40,7 +42,7 @@ def compile_less(input, output, less_path):
     if not os.path.exists(less_root):
         os.makedirs(less_root)
 
-    args = [LESS_EXECUTABLE, input]
+    args = [LESS_EXECUTABLE] + LESS_OPTIONS + [input]
     popen_kwargs = dict(
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE,