diff --git a/README.md b/README.md
index 498b493..40d8cd2 100755
--- a/README.md
+++ b/README.md
@@ -13,6 +13,12 @@ This may take a long while, especially if your platform needs to install and
 compile the cryptography package. It should be a reasonable wait on a Raspberry
 Pi Zero, 2 or 3 though.
 
+## Install CuraEngine Legacy plugin
+
+Octoprint newer than version 1.3.10 requires that the CuraEngine Legacy slicing
+plugin be installed. If running the Polar Cloud Plugin 1.9 or newer, CuraEngine
+Legacy slicer needs to be installed.
+
 ## Enable Polar Cloud timelapses
 
 To create timelapse movies in the format required by the Polar Cloud, the
@@ -47,7 +53,8 @@ printer with your PolarCloud user account.
 ## Notes and Limitations
 
 * Printing from the cloud requires the CuraEngine path to be set properly in
-  the Cura slicer plugin (octopi has this set up already).
+  the CuraEngine Legacy slicer plugin. A different CuraEngine plugin is installed by default in Octoprint prior to version 1.3.10. The latest version of the
+  Polar Cloud Plugin requires that the CuraEngine Legacy slicer is installed.
 * If you have a camera configured with OctoPrint you presently need to configure
   OctoPrint to use an absolute URL rather than a relative URL.  This so that the
   Polar Cloud's web interface can display the live camera feed in your web browser
diff --git a/octoprint_polarcloud/__init__.py b/octoprint_polarcloud/__init__.py
index c2b793b..b837a07 100755
--- a/octoprint_polarcloud/__init__.py
+++ b/octoprint_polarcloud/__init__.py
@@ -838,7 +838,7 @@ def _on_pause(self, data, *args, **kwargs):
 
 	#~~ print
 	def _get_slicer_name(self):
-		slicer = 'cura'
+		slicer = 'curalegacy'
 		if 'Printrbelt' in self._printer_type:
 			printrbelt_slicer = 'printrbelt-cura'
 			try:
@@ -874,7 +874,7 @@ def _on_print(self, data, *args, **kwargs):
 
 		info = {}
 		pos = (0, 0)
-		slicer = 'cura'
+		slicer = 'curalegacy'
 		if not gcode:
 			# need to slice then, so make sure we're set up to do that
 			if not 'configFile' in data:
diff --git a/setup.py b/setup.py
index 67d1d69..8bc5e4a 100755
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 plugin_identifier = "polarcloud"
 plugin_package = "octoprint_polarcloud"
 plugin_name = "OctoPrint-PolarCloud"
-plugin_version = "1.8"
+plugin_version = "1.9"
 plugin_description = """Connects OctoPrint to the PolarCloud so you can easily monitor and control outside of your local network"""
 plugin_author = "Mark Walker"
 plugin_author_email = "markwal@hotmail.com"