diff --git a/quantmod/chart.py b/quantmod/chart.py
index fa675d9..284cede 100755
--- a/quantmod/chart.py
+++ b/quantmod/chart.py
@@ -15,7 +15,7 @@
 import six
 import datetime as dt
 import pandas as pd
-import plotly.plotly as py
+import chart_studio.plotly as py
 import plotly.offline as pyo
 
 from . import tools
diff --git a/quantmod/theming/skeleton.py b/quantmod/theming/skeleton.py
index f17b71a..dd174af 100755
--- a/quantmod/theming/skeleton.py
+++ b/quantmod/theming/skeleton.py
@@ -9,7 +9,7 @@
 """
 # flake8: noqa
 
-_PLACEHOLDER = False
+_PLACEHOLDER = None
 
 # Color primitives
 BASE_COLORS = dict()
diff --git a/quantmod/tools.py b/quantmod/tools.py
index ca0974d..9f5751f 100755
--- a/quantmod/tools.py
+++ b/quantmod/tools.py
@@ -10,6 +10,7 @@
 import six
 import warnings
 import plotly
+import chart_studio.tools
 
 from . import auth
 from . import utils
@@ -245,6 +246,6 @@ def reset_config_file():
     ensure_local_files()
 
 
-set_credentials_file = plotly.tools.set_credentials_file
-get_credentials_file = plotly.tools.get_credentials_file
-reset_credentials_file = plotly.tools.reset_credentials_file
+set_credentials_file = chart_studio.tools.set_credentials_file
+get_credentials_file = chart_studio.tools.get_credentials_file
+reset_credentials_file = chart_studio.tools.reset_credentials_file