diff --git a/navipy/sensors/renderer.py b/navipy/sensors/renderer.py
index fe38d4896bcd3bc262a584686cd646cde0927b59..391eb5019c35c2435321b36da3d3bdd04635fea8 100644
--- a/navipy/sensors/renderer.py
+++ b/navipy/sensors/renderer.py
@@ -63,27 +63,27 @@ class BlenderRender():
         output_file.format.file_format = "OPEN_EXR"
         output_file.file_slots.remove(output_file.inputs[0])
         tmp_fileoutput = dict()
-	tmp_fileoutput['Image'] = 'Image'
-	tmp_fileoutput['Depth'] = 'Depth'
-	tmp_fileoutput['Folder'] = tempfile.TemporaryDirectory().name
-	tmp_fileoutput['ext'] = '.exr'
-	output_file.file_slots.new(tmp_fileoutput['Image'])
-	output_file.file_slots.new(tmp_fileoutput['Depth'])
-	output_file.base_path = tmp_fileoutput['Folder']
-	scene.node_tree.links.new(
-	    render_layers.outputs['Image'],
-	    output_file.inputs['Image']
-	)
+        tmp_fileoutput['Image'] = 'Image'
+        tmp_fileoutput['Depth'] = 'Depth'
+        tmp_fileoutput['Folder'] = tempfile.TemporaryDirectory().name
+        tmp_fileoutput['ext'] = '.exr'
+        output_file.file_slots.new(tmp_fileoutput['Image'])
+        output_file.file_slots.new(tmp_fileoutput['Depth'])
+        output_file.base_path = tmp_fileoutput['Folder']
+        scene.node_tree.links.new(
+            render_layers.outputs['Image'],
+            output_file.inputs['Image']
+        )
         if bpy.app.version < (2,79,0):
-	     scene.node_tree.links.new(
-	         render_layers.outputs['Z'],
-	         output_file.inputs['Depth']
-	     )
+             scene.node_tree.links.new(
+                 render_layers.outputs['Z'],
+                 output_file.inputs['Depth']
+             )
         else:
              scene.node_tree.links.new(
-	         render_layers.outputs['Depth'],
-	         output_file.inputs['Depth']
-	     )
+                 render_layers.outputs['Depth'],
+                 output_file.inputs['Depth']
+             )
         self.tmp_fileoutput = tmp_fileoutput
 
     @property