--- install.orig	2017-10-20 19:18:57.240322615 +0000
+++ install	2017-10-20 19:37:55.853078427 +0000
@@ -86,7 +86,7 @@
   end

   def supported_ruby_versions
-    ['2.3', '2.2', '2.1', '2.0']
+    ['2.4', '2.3', '2.2', '2.1', '2.0']
   end

   # check ruby version, only version 2.x works
@@ -311,6 +311,7 @@
     @log.info('Attempting to automatically detect supported package manager type for system...')

     has_yum = run_command('which yum >/dev/null 2>/dev/null')
+    has_dnf = run_command('which dnf >/dev/null 2>/dev/null')
     has_apt_get = run_command('which apt-get >/dev/null 2>/dev/null')
     has_gdebi = run_command('which gdebi >/dev/null 2>/dev/null')
     has_zypper = run_command('which zypper >/dev/null 2>/dev/null')
@@ -320,7 +321,7 @@
       exit(1)
     end

-    if(has_yum)
+    if(has_yum || has_dnf)
       @type = 'rpm'
     elsif(has_zypper)
       @type = 'zypper'
@@ -356,7 +357,7 @@
       @log.info('Running version matches target version, skipping install')
     else
       #use -y to answer yes to confirmation prompts
-      install_cmd = ['/usr/bin/yum', '-y', 'localinstall']
+      install_cmd = [has_dnf ? '/usr/bin/dnf' : '/usr/bin/yum', '-y', 'localinstall']
       install_from_s3(region, bucket, version_file_key, @type, install_cmd)
       do_sanity_check('/sbin/service')
     end