diff --git a/docs/source/appendix.rst b/docs/source/appendix.rst
index b15b51d6..27d28c2d 100644
--- a/docs/source/appendix.rst
+++ b/docs/source/appendix.rst
@@ -107,7 +107,7 @@ Asset Metadata
    :members:
 
 Data API
-~~~~
+~~~~~~~~
 
 .. autoclass:: zipline.data.minute_bars.BcolzMinuteBarWriter
    :members: