diff --git a/recipes/default.rb b/recipes/default.rb
index d3a258e..6e15a00 100644
--- a/recipes/default.rb
+++ b/recipes/default.rb
@@ -2,8 +2,8 @@
 #
 include_recipe 'python'
 
-# Pre-reqs that when installed by os package avoid compilation by pip
-%w[python-pymongo python-yaml supervisor sysstat build-essential python-lxml].each do |pkg_name|
+# Pre-reqs that when installed by os packages avoid or enable compilation by pip as needed
+%w[python-pymongo python-yaml supervisor sysstat build-essential libxml2-dev libxslt1-dev].each do |pkg_name|
   package pkg_name do
     action :install
   end
@@ -16,7 +16,7 @@ execute 'monasca-setup' do
 end
 
 python_pip 'monasca-agent' do
-  action :install
+  action :upgrade
   notifies :run, 'execute[monasca-setup]'
 end
 
diff --git a/spec/default_spec.rb b/spec/default_spec.rb
index 3126106..26c88be 100644
--- a/spec/default_spec.rb
+++ b/spec/default_spec.rb
@@ -27,7 +27,7 @@ describe 'monasca_agent::default' do
     end
 
     it 'python_pip installs monasca-agent' do
-      expect(chef_run).to install_python_pip 'monasca-agent'
+      expect(chef_run).to upgrade_python_pip 'monasca-agent'
     end
 
     it 'executes the monasca-setup program' do