diff --git a/requirements.txt b/requirements.txt
index 8736790..74bf8dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@
  algorithm==1.0.0
  dependency_injection==1.1.0
  filesystem_tree==1.0.1
+ first=2.0.1
  python-mimeparse==0.1.4
 aspen==0.42
 
@@ -16,7 +17,8 @@ mistune_contrib==0.1
 
 honcho==0.5.0
 
- six==1.10.0
-libsass==0.3.0
+ enum34==1.1.6
+ pathlib==1.0.1
+pyScss==1.3.5
 
 --editable .
diff --git a/vendor/enum34-1.1.6-py2-none-any.whl b/vendor/enum34-1.1.6-py2-none-any.whl
new file mode 100644
index 0000000..12be7c7
Binary files /dev/null and b/vendor/enum34-1.1.6-py2-none-any.whl differ
diff --git a/vendor/libsass-0.3.0.tar.gz b/vendor/libsass-0.3.0.tar.gz
deleted file mode 100644
index e8601ea..0000000
Binary files a/vendor/libsass-0.3.0.tar.gz and /dev/null differ
diff --git a/vendor/pathlib-1.0.1.tar.gz b/vendor/pathlib-1.0.1.tar.gz
new file mode 100644
index 0000000..9e9121a
Binary files /dev/null and b/vendor/pathlib-1.0.1.tar.gz differ
diff --git a/vendor/pyScss-1.3.5.tar.gz b/vendor/pyScss-1.3.5.tar.gz
new file mode 100644
index 0000000..91080c0
Binary files /dev/null and b/vendor/pyScss-1.3.5.tar.gz differ
diff --git a/www/assets/%version/inside.gratipay.css.spt b/www/assets/%version/inside.gratipay.css.spt
index a1287eb..82deb49 100644
--- a/www/assets/%version/inside.gratipay.css.spt
+++ b/www/assets/%version/inside.gratipay.css.spt
@@ -1,11 +1,11 @@
 import os
-import sass
+import scss
 
 filename = os.path.join(website.project_root, 'scss', 'inside.gratipay.scss')
 output_style = 'compressed' if website.compress_assets else 'nested'
 cache = os.environ.get('INSIDE_GRATIPAY_CACHE_CSS', '')
 [---]
-css = sass.compile(output_style=str(output_style),filename=str(filename))
+css = scss.compiler.compile_file(filename, output_style=output_style)
 if cache:
     response.headers['Expires'] = 'Sun, 17 Jan 2038 19:14:07 GMT'
 [---] via jinja2