diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89f1b2a..fb3e6aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 ## [Unreleased]
 ### Changed
 - Updated Travis configuration to include Ruby 2.4.1
+- Updated to be compatible with other type of private keys than RSA
 
 ### Removed
 - Ruby 1.9.3 from deploy-time testing (@eheydrick)
diff --git a/bin/check-etcd-peer-count.rb b/bin/check-etcd-peer-count.rb
index 9f38153..5b11a9a 100755
--- a/bin/check-etcd-peer-count.rb
+++ b/bin/check-etcd-peer-count.rb
@@ -87,7 +87,7 @@ def run
     r = RestClient::Resource.new("#{protocol}://#{config[:server]}:#{config[:port]}/v2/members",
                                  timeout: 5,
                                  ssl_client_cert: (OpenSSL::X509::Certificate.new(File.read(config[:cert])) unless config[:cert].nil?),
-                                 ssl_client_key: (OpenSSL::PKey::RSA.new(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
+                                 ssl_client_key: (OpenSSL::PKey.read(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
                                  ssl_ca_file:  config[:ca],
                                  verify_ssl:  config[:insecure] ? 0 : 1).get
     peers = JSON.parse(r.to_str)['members'].length
diff --git a/bin/check-etcd.rb b/bin/check-etcd.rb
index 0ed22e5..9023d87 100755
--- a/bin/check-etcd.rb
+++ b/bin/check-etcd.rb
@@ -124,7 +124,7 @@ def request(path, server)
     RestClient::Resource.new("#{protocol}://#{server}:#{config[:port]}/#{path}",
                              timeout: 5,
                              ssl_client_cert: (OpenSSL::X509::Certificate.new(File.read(config[:cert])) unless config[:cert].nil?),
-                             ssl_client_key: (OpenSSL::PKey::RSA.new(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
+                             ssl_client_key: (OpenSSL::PKey.read(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
                              ssl_ca_file:  config[:ca],
                              verify_ssl:  config[:insecure] ? 0 : 1).get
   end
diff --git a/bin/check-flannel-subnet-count.rb b/bin/check-flannel-subnet-count.rb
index 963d54f..c7f5aa6 100755
--- a/bin/check-flannel-subnet-count.rb
+++ b/bin/check-flannel-subnet-count.rb
@@ -122,7 +122,7 @@ def request(path, server)
       "#{protocol}://#{server}:#{config[:port]}/#{path}",
       timeout: 5,
       ssl_client_cert: (OpenSSL::X509::Certificate.new(File.read(config[:cert])) unless config[:cert].nil?),
-      ssl_client_key: (OpenSSL::PKey::RSA.new(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
+      ssl_client_key: (OpenSSL::PKey.read(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?),
       ssl_ca_file:  config[:ca],
       verify_ssl:  config[:insecure] ? 0 : 1
     ).get
diff --git a/bin/metrics-etcd.rb b/bin/metrics-etcd.rb
index eb8b96d..d4022e1 100755
--- a/bin/metrics-etcd.rb
+++ b/bin/metrics-etcd.rb
@@ -96,7 +96,7 @@ def run
         verify_mode: (config[:insecure] ? OpenSSL::SSL::VERIFY_NONE : OpenSSL::SSL::VERIFY_PEER),
         ca_file: config[:ca],
         ssl_cert: (OpenSSL::X509::Certificate.new(File.read(config[:cert])) unless config[:cert].nil?),
-        ssl_key:  (OpenSSL::PKey::RSA.new(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?)
+        ssl_key:  (OpenSSL::PKey.read(File.read(config[:key]), config[:passphrase]) unless config[:key].nil?)
       )
     else
       client = Etcd.client(host: config[:etcd_host], port: config[:etcd_port])