diff --git a/dev/buildbot/master/master.cfg b/dev/buildbot/master/master.cfg
index f893090a..01fbc22e 100644
--- a/dev/buildbot/master/master.cfg
+++ b/dev/buildbot/master/master.cfg
@@ -391,8 +391,8 @@ def websiteFactory(platform, fullBuild=False):
     #
     # Create the factory to add the actions to
     factory = getBaseFactory()
-    # Upgrade cython if needed
-    factory.addStep(ShellCommand(command=' '.join([docActivateCmd(), "pip", "install", "--upgrade", "cython"]), workdir= 'build/wrappers/Python', haltOnFailure = True))
+    ## Upgrade cython if needed
+    #factory.addStep(ShellCommand(command=' '.join([docActivateCmd(), "pip", "install", "--upgrade", "cython"]), workdir= 'build/wrappers/Python', haltOnFailure = True))
     # Make a wheel - this is advantageous because it forces pip to uninstall coolprop, ensuring that all files installed are from this wheel
     factory.addStep(ShellCommand(command=' '.join([docActivateCmd(), "python", "setup.py", "bdist_wheel", '--dist-dir', 'dist']), workdir= 'build/wrappers/Python', haltOnFailure = True))
     # List the files in the dist directory
@@ -462,8 +462,8 @@ def pythonFactory(pyID, pyCFG=PythonSlaveConfig("name")):
     #
     # Create the factory to add the actions to
     factory = getBaseFactory()
-    # Upgrade cython
-    factory.addStep(ShellCommand(command=combinedCMD('pip install --upgrade cython'), workdir=workingFolder, haltOnFailure=True))
+    ## Upgrade cython
+    #factory.addStep(ShellCommand(command=combinedCMD('pip install --upgrade cython'), workdir=workingFolder, haltOnFailure=True))
     # 
     # Install dependencies
     if installPackages and False: # disabled