diff --git a/autoapi/mappers/base.py b/autoapi/mappers/base.py
index c025ffd..ef273bc 100644
--- a/autoapi/mappers/base.py
+++ b/autoapi/mappers/base.py
@@ -9,7 +9,6 @@ import sphinx.util
 from sphinx.util.console import darkgreen, bold
 from sphinx.util.osutil import ensuredir
 from sphinx.util.docstrings import prepare_docstring
-from sphinx.ext.napoleon.docstring import GoogleDocstring, NumpyDocstring
 
 from ..settings import API_ROOT
 
@@ -182,10 +181,7 @@ class SphinxMapperBase(object):
         )
 
         def _wrapped_prepare(value):
-            preped_value = '\n'.join(prepare_docstring(value))
-            numpy_value = str(NumpyDocstring(preped_value))
-            final_value = str(GoogleDocstring(numpy_value))
-            return final_value
+            return '\n'.join(prepare_docstring(value))
 
         self.jinja_env.filters['prepare_docstring'] = _wrapped_prepare