diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 0866d5424cab8c69c25d6c43a6d3359a67816bc4..31e79d2d9e948611abfe004f8d306eceb4c26938 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -77,7 +77,7 @@ Ready to contribute? Here's how to set up `data2passcal` for local development.
    tests::
 
     $ python -m unittest (or python -m unittest tests.test_data2passcal under Python2)
-    
+
 6. Commit your changes and push your branch to GitHub::
 
     $ git add .