diff --git a/src/Modules/General/layout.py b/src/Modules/General/layout.py
index e95290947490c7f210944b0e836c9e5e8e085da0..f26bcca1b9323653eadcc34de7bb68a4d46c9e1d 100755
--- a/src/Modules/General/layout.py
+++ b/src/Modules/General/layout.py
@@ -147,9 +147,9 @@ class layout(layoutOp):
                                                 value=[str(i) for i in (
                                                     i for i in self.g.Layer_Neuron if i != "Input")],
                                                 multi=True,
-                                                style={"minWidth": "20%", "marginLeft": "15px", "textAlign": "start"})], className="row", style={"paddingLeft": "20px", 'width': '100%'})
+                                                style={"minWidth": "20%", "marginLeft": "15px", "textAlign": "start"})], className="d-flex", style={"paddingLeft": "20px", 'width': '100%'})
                                         ], className="col-12")
-                                    ], className="row"),
+                                    ], className="d-flex"),
                                     html.Div([dcc.Graph(id='general-graph', animate=False, config={"displaylogo": False})])], className="col-lg-9 col-sm-12 col-xs-12" if(self.g.labelsExistance) else "col-lg-12 col-sm-12 col-xs-12"),
                                     html.Div([
                                         html.Div([
@@ -161,7 +161,7 @@ class layout(layoutOp):
                                                 size=30,
                                                 color="#28a745",
                                                 style={"marginLeft": "10px"}
-                                            )], className="row"),
+                                            )], className="d-flex"),
                                         dcc.Graph(id='label-graph', animate=False, config={"displaylogo": False})], className="col-lg-3 col-sm-12 col-xs-12") if(self.g.labelsExistance) else []], className="row")
                             ], style={"padding": "5px"})), label="General information", value="General information"),
                     dcc.Tab(dbc.Card(
@@ -255,6 +255,7 @@ class layout(layoutOp):
                             id='vis-slider',
                             min=0,
                             max=self.g.stepMax,
+                            marks=None,
                             step=1,
                             value=0,
                         )], style={"textAlign": "start", "padding": "5px"})],
diff --git a/src/Modules/Neuron/callbacks.py b/src/Modules/Neuron/callbacks.py
index 4e409c79f6f26b62a3f71f19239d9912ffe82b49..c25926faabfeec5cab56d6fc510e55a84a0aa837 100755
--- a/src/Modules/Neuron/callbacks.py
+++ b/src/Modules/Neuron/callbacks.py
@@ -9,8 +9,7 @@ import statistics
 import dash_daq as daq
 from collections import deque
 import plotly.graph_objects as go
-import dash_core_components as dcc
-import dash_html_components as html
+from dash import dcc, html
 from bson.json_util import dumps, loads
 from dash.exceptions import PreventUpdate
 from dash.dependencies import ALL, MATCH, Input, Output, State
diff --git a/src/Modules/Neuron/layout.py b/src/Modules/Neuron/layout.py
index 518969e656ddf1897f9091e79f73cf54436e7274..ad14181e5676037043f40462e40fb7c06f57e042 100755
--- a/src/Modules/Neuron/layout.py
+++ b/src/Modules/Neuron/layout.py
@@ -8,8 +8,7 @@ from .callbacks import callbacks
 from bson.json_util import dumps
 from bson.json_util import loads
 import plotly.graph_objects as go
-import dash_core_components as dcc
-import dash_html_components as html
+from dash import dcc, html
 import dash_bootstrap_components as dbc
 from src.templates.layoutOp import layoutOp
 
diff --git a/src/Modules/Neuron/spark.py b/src/Modules/Neuron/spark.py
index 69705a6be5d4dd891b42ca64c88add867f0de785..2585b138a71298e9d006e2282751f613cd8bd8de 100755
--- a/src/Modules/Neuron/spark.py
+++ b/src/Modules/Neuron/spark.py
@@ -33,7 +33,7 @@ class spark(sparkOp):
                 # --------------------------------------------------------
                 # Spike per neuron
                 df = self.g.sparkSession.read.format("com.mongodb.spark.sql") \
-                    .option("spark.mongodb.input.uri", self.MONGODB_URL + self.g.name + "."+self.DOCUMENT_NAME+"?authSource=admin&readPreference=primaryPreferred") \
+                    .option("spark.mongodb.input.uri", self.MONGODBURL + self.g.name + "."+self.DOCUMENT_NAME+"?authSource=admin&readPreference=primaryPreferred") \
                     .option("pipeline", "[{ $sort : { T : 1} }]")
 
                 df = df.load()
@@ -48,7 +48,7 @@ class spark(sparkOp):
 
                 df.write.format("com.mongodb.spark.sql.DefaultSource") \
                         .option("spark.mongodb.output.uri",
-                                self.MONGODB_URL + self.g.name + "."+self.OUTPUT_DOCUMENT_NAME+"?authSource=admin&readPreference=primaryPreferred").mode("overwrite").save()
+                                self.MONGODBURL + self.g.name + "."+self.OUTPUT_DOCUMENT_NAME+"?authSource=admin&readPreference=primaryPreferred").mode("overwrite").save()
 
                 # --------------------------------------------------------
             else: