diff --git a/panel/layout.py b/panel/layout.py
index d0c92558411..958e9b3ded8 100644
--- a/panel/layout.py
+++ b/panel/layout.py
@@ -340,7 +340,7 @@ def _get_model(self, doc, root=None, parent=None, comm=None):
         return model
 
 
-class VSpacer(Reactive):
+class VSpacer(Spacer):
     """
     Spacer which automatically fills all available vertical space.
     """
@@ -348,7 +348,7 @@ class VSpacer(Reactive):
     sizing_mode = param.Parameter(default='stretch_height', readonly=True)
 
 
-class HSpacer(Reactive):
+class HSpacer(Spacer):
     """
     Spacer which automatically fills all available horizontal space.
     """
diff --git a/panel/pipeline.py b/panel/pipeline.py
index f40b45d904e..f9051b18688 100644
--- a/panel/pipeline.py
+++ b/panel/pipeline.py
@@ -6,7 +6,7 @@
 import numpy as np
 
 from .holoviews import HoloViews
-from .layout import Row, Column, Spacer
+from .layout import Row, Column, HSpacer, VSpacer
 from .pane import Markdown, Pane
 from .param import Param
 from .util import param_reprs
@@ -49,7 +49,7 @@ def __init__(self, stages=[], **params):
         prev_button.layout[0].disabled = True
         self._progress_bar = Row(self._make_progress, prev_button, next_button)
         spinner = Pane(os.path.join(os.path.dirname(__file__), 'assets', 'spinner.gif'))
-        self._spinner_layout = Row(Spacer(width=300), Column(Spacer(height=200), spinner))
+        self._spinner_layout = Row(HSpacer(), Column(VSpacer(), spinner, VSpacer()), HSpacer())
         stage_layout = Row()
         if len(stages):
             stage_layout.append(self._init_stage())