diff --git a/manifests/cgroups.pp b/manifests/cgroups.pp
index e379c60..d878d79 100644
--- a/manifests/cgroups.pp
+++ b/manifests/cgroups.pp
@@ -36,7 +36,7 @@ class jenkins::cgroups {
   # Starting with Ubuntu Quantal (12.10) cgroup-bin dropped its upstart jobs.
   if $::osfamily == 'Debian' {
 
-    if $::operatingsystem == 'Ubuntu' and $::operatingsystemrelease >= '12.10' {
+    if $::operatingsystem == 'Ubuntu' and versioncmp($::operatingsystemrelease, '12.10') >= 0 {
 
       file { '/etc/init/cgconfig.conf':
         ensure  => present,
diff --git a/manifests/params.pp b/manifests/params.pp
index 12a2a60..e5a411c 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -7,7 +7,7 @@ class jenkins::params {
     'RedHat': {
       #yum groupinstall "Development Tools"
       # common packages
-      if ($::operatingsystem == 'Fedora') and ($::operatingsystemrelease >= 21) {
+      if ($::operatingsystem == 'Fedora') and (versioncmp($::operatingsystemrelease, '21') >= 0) {
         $jdk_package = 'java-1.8.0-openjdk-devel'
       } else {
         $jdk_package = 'java-1.7.0-openjdk-devel'
@@ -17,7 +17,7 @@ class jenkins::params {
       # FIXME: No Maven packages on RHEL
       #$maven_package = 'maven'
       $cgroups_package = 'libcgroup'
-      if ($::operatingsystem == 'Fedora') and ($::operatingsystemrelease >= 19) {
+      if ($::operatingsystem == 'Fedora') and (versioncmp($::operatingsystemrelease, '19') >= 0) {
         $cgroups_tools_package = 'libcgroup-tools'
         $cgconfig_require = [
           Package['cgroups'],
diff --git a/manifests/plugin.pp b/manifests/plugin.pp
index 03bb4c5..ac1be8c 100644
--- a/manifests/plugin.pp
+++ b/manifests/plugin.pp
@@ -18,19 +18,18 @@
 #
 
 define jenkins::plugin(
-  $version=0,
+  $version='latest',
   $pin=false,
 ) {
   $plugin            = "${name}.hpi"
   $plugin_dir        = '/var/lib/jenkins/plugins'
   $plugin_parent_dir = '/var/lib/jenkins'
 
-  if ($version != 0) {
+  if ($version == 'latest') {
+    $base_url = 'http://updates.jenkins-ci.org/latest'
+  } else {
     $base_url = "http://updates.jenkins-ci.org/download/plugins/${name}/${version}"
   }
-  else {
-    $base_url   = 'http://updates.jenkins-ci.org/latest'
-  }
 
   if (!defined(File[$plugin_dir])) {
     file {