diff --git a/markdown/__init__.py b/markdown/__init__.py
index 1375523a9..077417442 100644
--- a/markdown/__init__.py
+++ b/markdown/__init__.py
@@ -122,6 +122,7 @@ def build_parser(self):
         self.inlinePatterns = build_inlinepatterns(self)
         self.treeprocessors = build_treeprocessors(self)
         self.postprocessors = build_postprocessors(self)
+        return self
 
     def registerExtensions(self, extensions, configs):
         """
@@ -147,6 +148,8 @@ def registerExtensions(self, extensions, configs):
                 'Extension "%s.%s" must be of type: "markdown.Extension".' \
                     % (ext.__class__.__module__, ext.__class__.__name__))
 
+        return self
+
     def build_extension(self, ext_name, configs = []):
         """Build extension by name, then return the module.
 
@@ -191,6 +194,7 @@ def build_extension(self, ext_name, configs = []):
     def registerExtension(self, extension):
         """ This gets called by the extension """
         self.registeredExtensions.append(extension)
+        return self
 
     def reset(self):
         """
@@ -203,6 +207,8 @@ def reset(self):
             if hasattr(extension, 'reset'):
                 extension.reset()
 
+        return self
+
     def set_output_format(self, format):
         """ Set the output format for the class instance. """
         try:
@@ -211,6 +217,7 @@ def set_output_format(self, format):
             message(CRITICAL,
                     'Invalid Output Format: "%s". Use one of %s.' \
                                % (format, self.output_formats.keys()))
+        return self
 
     def convert(self, source):
         """
@@ -326,6 +333,8 @@ def convertFile(self, input=None, output=None, encoding=None):
         else:
             output.write(html.encode(encoding))
 
+        return self
+
 
 """
 EXPORTED FUNCTIONS