diff --git a/gooey/gui/imageutil.py b/gooey/gui/imageutil.py
index 9e46568..a4375e1 100644
--- a/gooey/gui/imageutil.py
+++ b/gooey/gui/imageutil.py
@@ -3,31 +3,34 @@ Created on Jan 20, 2014
 
 @author: Chris
 '''
+
 import wx
+from gooey.gui.three_to_four import imageFromBitmap, bitmapFromImage
+
+
 
 
 def _load_image(image_path):
-  try:
-    return wx.Bitmap(image_path)
-  except:
-    raise IOError('Invalid Image path')
+    try:
+        return wx.Bitmap(image_path)
+    except:
+        raise IOError('Invalid Image path')
 
 
 def resize_bitmap(parent, _bitmap, target_height):
-  '''
-  Resizes a bitmap to a height of 89 pixels (the
-  size of the top panel), while keeping aspect ratio
-  in tact
-  '''
-  image = _bitmap.ConvertToImage()
-  _width, _height = image.GetSize()
-  if _height < target_height:
-    return wx.StaticBitmap(parent, -1, wx.Bitmap(image))
-  ratio = float(_width) / _height
-  image = image.Scale(target_height * ratio, target_height, wx.IMAGE_QUALITY_HIGH)
-  return wx.StaticBitmap(parent, -1, wx.Bitmap(image))
-
+    '''
+    Resizes a bitmap to a height of 89 pixels (the
+    size of the top panel), while keeping aspect ratio
+    in tact
+    '''
+    image = imageFromBitmap(_bitmap)
+    _width, _height = image.GetSize()
+    if _height < target_height:
+        return wx.StaticBitmap(parent, -1, bitmapFromImage(image))
+    ratio = float(_width) / _height
+    image = image.Scale(target_height * ratio, target_height, wx.IMAGE_QUALITY_HIGH)
+    return wx.StaticBitmap(parent, -1, bitmapFromImage(image))
 
 
 if __name__ == '__main__':
-  pass
+    pass
diff --git a/gooey/gui/three_to_four.py b/gooey/gui/three_to_four.py
new file mode 100644
index 0000000..33dbfe2
--- /dev/null
+++ b/gooey/gui/three_to_four.py
@@ -0,0 +1,47 @@
+'''
+Util for supporting WxPython 3 & 4
+'''
+
+import wx
+try:
+    import wx.adv
+except ImportError:
+    pass
+
+isLatestVersion = wx.version().startswith('4')
+
+
+class Constants:
+    if isLatestVersion:
+        WX_FONTSTYLE_NORMAL = wx.FONTSTYLE_NORMAL
+        WX_DP_DROPDOWN = wx.adv.DP_DROPDOWN
+    else:
+        WX_FONTSTYLE_NORMAL = wx.FONTWEIGHT_NORMAL
+        WX_DP_DROPDOWN = wx.DP_DROPDOWN
+
+
+class Classes:
+    if isLatestVersion:
+        DatePickerCtrl = wx.adv.DatePickerCtrl
+    else:
+        DatePickerCtrl = wx.DatePickerCtrl
+
+
+
+
+def imageFromBitmap(bitmap):
+    if isLatestVersion:
+        return bitmap.ConvertToImage()
+    else:
+        return wx.ImageFromBitmap(bitmap)
+
+
+def bitmapFromImage(image):
+    if isLatestVersion:
+        return wx.Bitmap(image)
+    else:
+        return wx.BitmapFromImage(image)
+
+
+
+
diff --git a/gooey/gui/util/wx_util.py b/gooey/gui/util/wx_util.py
index 327bada..1b8184b 100644
--- a/gooey/gui/util/wx_util.py
+++ b/gooey/gui/util/wx_util.py
@@ -4,46 +4,61 @@ Collection of Utility methods for creating often used, pre-styled wx Widgets
 
 import wx
 
+from gooey.gui.three_to_four import Constants
+
+
+styles = {
+    'h0': (wx.FONTFAMILY_DEFAULT, Constants.WX_FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False),
+    'h1': (wx.FONTFAMILY_DEFAULT, Constants.WX_FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False),
+    'h2': (wx.FONTFAMILY_DEFAULT, Constants.WX_FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL, False),
+    'bold': (wx.FONTFAMILY_DEFAULT, Constants.WX_FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False)
+}
+
 
 def make_bold(statictext):
-  pointsize = statictext.GetFont().GetPointSize()
-  font = wx.Font(pointsize, wx.FONTFAMILY_DEFAULT,
-                 wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False)
-  statictext.SetFont(font)
+    pointsize = statictext.GetFont().GetPointSize()
+    font = wx.Font(pointsize, *styles['bold'])
+    statictext.SetFont(font)
+
 
 def dark_grey(statictext):
-  darkgray = (54, 54, 54)
-  statictext.SetForegroundColour(darkgray)
+    darkgray = (54, 54, 54)
+    statictext.SetForegroundColour(darkgray)
+
 
 def h0(parent, label):
-  text = wx.StaticText(parent, label=label)
-  font_size = text.GetFont().GetPointSize()
-  font = wx.Font(font_size * 1.4, *(wx.FONTFAMILY_DEFAULT, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False))
-  text.SetFont(font)
-  return text
+    text = wx.StaticText(parent, label=label)
+    font_size = text.GetFont().GetPointSize()
+    font = wx.Font(font_size * 1.4, *styles['h0'])
+    text.SetFont(font)
+    return text
+
 
 def h1(parent, label):
-  return _header(parent, label, (wx.FONTFAMILY_DEFAULT, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False))
+    return _header(parent, label, styles['h1'])
+
 
 def h2(parent, label):
-  return _header(parent, label, (wx.FONTFAMILY_DEFAULT, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL, False))
+    return _header(parent, label, styles['h2'])
+
 
 def _header(parent, label, styles):
-  text = wx.StaticText(parent, label=label)
-  font_size = text.GetFont().GetPointSize()
-  font = wx.Font(font_size * 1.2, *styles)
-  text.SetFont(font)
-  return text
+    text = wx.StaticText(parent, label=label)
+    font_size = text.GetFont().GetPointSize()
+    font = wx.Font(font_size * 1.2, *styles)
+    text.SetFont(font)
+    return text
+
 
 def horizontal_rule(parent):
-  return _rule(parent, wx.LI_HORIZONTAL)
+    return _rule(parent, wx.LI_HORIZONTAL)
 
-def vertical_rule(parent):
-  return _rule(parent, wx.LI_VERTICAL)
 
-def _rule(parent, direction):
-  line = wx.StaticLine(parent, -1, style=direction)
-  line.SetSize((10, 10))
-  return line
+def vertical_rule(parent):
+    return _rule(parent, wx.LI_VERTICAL)
 
 
+def _rule(parent, direction):
+    line = wx.StaticLine(parent, -1, style=direction)
+    line.SetSize((10, 10))
+    return line
diff --git a/gooey/gui/widgets/calender_dialog.py b/gooey/gui/widgets/calender_dialog.py
index 40509cc..4b98161 100644
--- a/gooey/gui/widgets/calender_dialog.py
+++ b/gooey/gui/widgets/calender_dialog.py
@@ -1,10 +1,11 @@
 __author__ = 'Chris'
 
 import wx
-import wx.adv
 
 from gooey.gui.util import wx_util
 
+from gooey.gui.three_to_four import Classes, Constants
+
 
 class CalendarDlg(wx.Dialog):
   def __init__(self, parent):
@@ -13,7 +14,7 @@ class CalendarDlg(wx.Dialog):
     self.SetBackgroundColour('#ffffff')
 
     self.ok_button = wx.Button(self, wx.ID_OK, label='Ok')
-    self.datepicker = wx.adv.DatePickerCtrl(self, style=wx.adv.DP_DROPDOWN)
+    self.datepicker = Classes.DatePickerCtrl(self, style=Constants.WX_DP_DROPDOWN)
 
     vertical_container = wx.BoxSizer(wx.VERTICAL)
     vertical_container.AddSpacer(10)
diff --git a/gooey/gui/windows/runtime_display_panel.py b/gooey/gui/windows/runtime_display_panel.py
index c3a8292..b3c1444 100644
--- a/gooey/gui/windows/runtime_display_panel.py
+++ b/gooey/gui/windows/runtime_display_panel.py
@@ -7,6 +7,8 @@ Created on Dec 23, 2013
 import wx
 from gooey.gui.lang import i18n
 
+from gooey.gui.three_to_four import Constants
+
 
 class RuntimeDisplay(wx.Panel):
   '''
@@ -22,7 +24,7 @@ class RuntimeDisplay(wx.Panel):
   def set_font_style(self, style):
     pointsize = self.cmd_textbox.GetFont().GetPointSize()
     font = wx.Font(pointsize, style,
-                 wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False)
+                   Constants.WX_FONTSTYLE_NORMAL, wx.FONTWEIGHT_BOLD, False)
     self.cmd_textbox.SetFont(font)
 
   def _init_properties(self):
diff --git a/setup.py b/setup.py
index dcbd229..3a499f5 100644
--- a/setup.py
+++ b/setup.py
@@ -18,6 +18,10 @@ setup(
                  'application with one line'),
     license='MIT',
     packages=find_packages(),
+    install_requires=[
+        'wxpython==5.7',
+        'Rx==1.5.9'
+    ],
     include_package_data=True,
     dependency_links = ["http://www.wxpython.org/download.php"],
     classifiers = [