diff --git a/web.py b/web.py
index dbb6c5e..9043868 100644
--- a/web.py
+++ b/web.py
@@ -67,15 +67,17 @@ def parse_request(request):
 
 class MyServer(BaseHTTPRequestHandler):
     def do_GET(self):
-        if re.match(r'/data/\w+\.pdf', self.path) is not None:
-            if not os.path.exists(self.path):
+        match = re.match(r'/data/(\w+\.pdf)', self.path)
+        if match is not None:
+            pdf_path = os.path.join(OUT_DIR, match.groups()[0])
+            if not os.path.exists(pdf_path):
                 self.send_response(404)
                 self.end_headers()
                 return
             self.send_response(200)
             self.send_header("Content-type", "application/pdf")
             self.end_headers()
-            with open(self.path, 'rb') as f:
+            with open(pdf_path, 'rb') as f:
                 self.wfile.write(f.read())
             return