diff --git a/atst/assets.py b/atst/assets.py
new file mode 100644
index 00000000..87a17c6d
--- /dev/null
+++ b/atst/assets.py
@@ -0,0 +1,16 @@
+from webassets import Environment, Bundle
+from atst.home import home
+
+assets = Environment(
+    directory=home.child("scss"),
+    url="/static"
+)
+print(assets.url_expire)
+css = Bundle(
+    "atat.scss",
+    filters="scss",
+    output="../static/assets/out.%(version)s.css",
+    depends=("**/*.scss"),
+)
+
+assets.register("css", css)
diff --git a/atst/handler.py b/atst/handler.py
index 6272743c..be7a5bf4 100644
--- a/atst/handler.py
+++ b/atst/handler.py
@@ -1,17 +1,7 @@
-from webassets import Environment, Bundle
 import tornado.web
-from atst.home import home
+from atst.assets import assets
 from atst.sessions import SessionNotFoundError
 
-assets = Environment(directory=home.child("scss"), url="/static")
-css = Bundle(
-    "atat.scss",
-    filters="scss",
-    output="../static/assets/out.css",
-    depends=("**/*.scss"),
-)
-
-assets.register("css", css)
 helpers = {"assets": assets}
 
 
diff --git a/precompile.py b/precompile.py
new file mode 100644
index 00000000..898f8902
--- /dev/null
+++ b/precompile.py
@@ -0,0 +1,11 @@
+import logging
+from atst.assets import assets
+from webassets.script import CommandLineEnvironment
+
+# Setup a logger
+log = logging.getLogger('webassets')
+log.addHandler(logging.StreamHandler())
+log.setLevel(logging.DEBUG)
+
+cmdenv = CommandLineEnvironment(assets, log)
+cmdenv.build()