diff --git a/doc/source/conf.py b/doc/source/conf.py
index a038e8e3c..1a1e1d9ef 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -26,7 +26,7 @@ MOCK_MODULES = [
     "blist", "gym", "gym.spaces", "psutil", "ray._raylet",
     "ray.core.generated", "ray.core.generated.gcs_pb2",
     "ray.core.generated.ray.protocol.Task", "scipy", "scipy.signal",
-    "scipy.stats", "tensorflow_probability", "tensorflow",
+    "scipy.stats", "setproctitle", "tensorflow_probability", "tensorflow",
     "tensorflow.contrib", "tensorflow.contrib.all_reduce",
     "tensorflow.contrib.all_reduce.python", "tensorflow.contrib.layers",
     "tensorflow.contrib.rnn", "tensorflow.contrib.slim", "tensorflow.core",
@@ -71,7 +71,6 @@ sphinx_gallery_conf = {
     "ignore_pattern": "../examples/doc_code/",
     "plot_gallery": "False",
     # "filename_pattern": "tutorial.py",
-    "backreferences_dir": False
     # "show_memory': False,
     # 'min_reported_time': False
 }