diff --git a/samples/02_power_users_developers/building_a_change_detection_app_using_jupyter_dashboard.ipynb b/samples/02_power_users_developers/building_a_change_detection_app_using_jupyter_dashboard.ipynb
index 9575bea241..485ef9e102 100644
--- a/samples/02_power_users_developers/building_a_change_detection_app_using_jupyter_dashboard.ipynb
+++ b/samples/02_power_users_developers/building_a_change_detection_app_using_jupyter_dashboard.ipynb
@@ -254,7 +254,7 @@
     "oldslider = widgets.IntSlider(value=oldindex, min=0,max=10, #len(df) - 1,\n",
     "                              step=1, description='Older:', disabled=False,\n",
     "                              continuous_update=True, orientation='horizontal',\n",
-    "                              readout=False, readout_format='i', slider_color='white')\n",
+    "                              readout=False, readout_format='', slider_color='white')\n",
     "\n",
     "old_label = widgets.Label(value='')#str(df.Time.iloc[oldindex].date()))\n",
     "\n",
@@ -317,7 +317,7 @@
     "newslider = widgets.IntSlider(value=newindex, min=0, max=10, #len(df) - 1,\n",
     "                              step=1, description='Newer:', disabled=False,\n",
     "                              continuous_update=True, orientation='horizontal',\n",
-    "                              readout=False, readout_format='i', slider_color='white')\n",
+    "                              readout=False, readout_format='', slider_color='white')\n",
     "\n",
     "new_label = widgets.Label(value='') #str(df.Time.iloc[newindex].date()))\n",
     "\n",
@@ -557,7 +557,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.3"
+   "version": "3.6.5"
   },
   "widgets": {
    "state": {