More documentation
diff --git a/doc/conf.py b/doc/conf.py
index 3ee83f1..ad49886 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -26,7 +26,9 @@
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.doctest', 'sphinx.ext.todo',
-    'sphinx.ext.coverage', 'sphinx.ext.viewcode', 'sphinx.ext.pngmath']
+    'sphinx.ext.coverage', 'sphinx.ext.pngmath']
+
+# I would like to add 'sphinx.ext.viewcode', but it causes a UnicodeDecodeError
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -35,7 +37,7 @@
 source_suffix = '.rst'
 
 # The encoding of source files.
-#source_encoding = 'utf-8-sig'
+source_encoding = 'utf-8'
 
 # The master toctree document.
 master_doc = 'index'