diff --git a/pptx_template/__init__.py b/pptx_template/__init__.py
index 0d6aff1..c0a052a 100644
--- a/pptx_template/__init__.py
+++ b/pptx_template/__init__.py
@@ -1,3 +1,3 @@
 #
 # coding=utf-8
-__version__ = '0.2.7'
+__version__ = '0.2.8'
diff --git a/pptx_template/chart.py b/pptx_template/chart.py
index b6e5bdb..dd93bec 100644
--- a/pptx_template/chart.py
+++ b/pptx_template/chart.py
@@ -45,9 +45,9 @@ def _build_xy_chart_data(csv, xy_transpose, number_format):
         xy_col = csv.iloc[:, [0, i]]
         for (_, row) in xy_col.iterrows():
             if xy_transpose:
-                x, y = _nan_to_none(row[0]), _nan_to_none(row[1])
-            else:
                 y, x = _nan_to_none(row[0]), _nan_to_none(row[1])
+            else:
+                x, y = _nan_to_none(row[0]), _nan_to_none(row[1])
             log.debug(u" Adding xy %s,%s" % (x, y))
             series.add_data_point(x, y)
     return chart_data