diff --git a/bin/install b/bin/install
index 717a2337..11c68560 100755
--- a/bin/install
+++ b/bin/install
@@ -77,7 +77,7 @@ To use a HTTP proxy, specify --proxy followed by the proxy server
 defined by http://hostname:port
 
 This install script needs Ruby version 2.x installed as a prerequisite.
-Currently recommanded Ruby versions are 2.0.0, 2.1.8, 2.2.4 and 2.3.0.
+Currently recommanded Ruby versions are 2.0.0, 2.1.8, 2.2.4, 2.3.0 and 2.4.0.
 If multiple Ruby versions are installed, the default ruby version will be used.
 If the default ruby version does not satisfy reqirement, the newest version will be used.
 If you do not have a supported Ruby version installed, please install one of them first.
@@ -86,7 +86,7 @@ EOF
   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
@@ -163,7 +163,7 @@ EOF
     # change interpreter when symlink /usr/bin/ruby2.x exists, but running with non-supported ruby version
     actual_ruby_version = RUBY_VERSION.split('.').map{|s|s.to_i}
     left_bound = '2.0.0'.split('.').map{|s|s.to_i}
-    right_bound = '2.3.1'.split('.').map{|s|s.to_i}
+    right_bound = '2.4.1'.split('.').map{|s|s.to_i}
     if (actual_ruby_version <=> left_bound) < 0
       if(!@reexeced)
         @log.info("The current Ruby version is not 2.x! Restarting the installer with #{ruby_interpreter_path}")
diff --git a/test/instance_agent/agent/base_test.rb b/test/instance_agent/agent/base_test.rb
index 620092d5..e5f871ee 100644
--- a/test/instance_agent/agent/base_test.rb
+++ b/test/instance_agent/agent/base_test.rb
@@ -48,7 +48,7 @@ class InstanceAgentBaseTest < InstanceAgentTestCase
         @base.expects(:log).with { |v1, v2| v1.eql?(:error) && v2 =~ /Error during perform/ }
         assert_nothing_raised { @base.run }
       end
-      
+
       should 'back off on repeated exceptions' do
         @base.stubs(:perform).raises Exception
         @base.expects(:sleep).with(any_of(9, 10))