diff --git a/pycco_resources/__init__.py b/pycco_resources/__init__.py
index 08767b7..d992f4c 100644
--- a/pycco_resources/__init__.py
+++ b/pycco_resources/__init__.py
@@ -86,6 +86,7 @@
   .docs pre {
     margin: 15px 0 15px;
     padding-left: 15px;
+    overflow-y: scroll;
   }
   .docs p tt, .docs p code {
     background: #f8f8ff;