diff --git a/Gemfile.lock b/Gemfile.lock
index e8d0be8..5f521e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    esendex (0.6.0)
+    esendex (0.6.1)
       nestful (~> 0.0.8)
-      nokogiri (~> 1.6.8.1)
+      nokogiri (~> 1.8)
 
 GEM
   remote: http://rubygems.org/
@@ -44,9 +44,9 @@ GEM
     concurrent-ruby (1.0.5)
     diff-lcs (1.3)
     erubis (2.7.0)
-    ffi (1.9.21)
-    ffi (1.9.21-x64-mingw32)
-    ffi (1.9.21-x86-mingw32)
+    ffi (1.9.25)
+    ffi (1.9.25-x64-mingw32)
+    ffi (1.9.25-x86-mingw32)
     formatador (0.2.5)
     growl (1.0.3)
     guard (2.14.2)
@@ -69,22 +69,22 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    lumberjack (1.0.12)
+    lumberjack (1.0.13)
     mail (2.7.0)
       mini_mime (>= 0.1.1)
     method_source (0.9.0)
-    mini_mime (1.0.0)
-    mini_portile2 (2.1.0)
+    mini_mime (1.0.1)
+    mini_portile2 (2.3.0)
     minitest (5.11.3)
     nenv (0.3.0)
     nestful (0.0.8)
       activesupport (>= 3.0.0.beta)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
-    nokogiri (1.6.8.1-x64-mingw32)
-      mini_portile2 (~> 2.1.0)
-    nokogiri (1.6.8.1-x86-mingw32)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.8.4)
+      mini_portile2 (~> 2.3.0)
+    nokogiri (1.8.4-x64-mingw32)
+      mini_portile2 (~> 2.3.0)
+    nokogiri (1.8.4-x86-mingw32)
+      mini_portile2 (~> 2.3.0)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -112,34 +112,34 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.2.1)
-    rb-fsevent (0.10.2)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rspec (3.7.0)
-      rspec-core (~> 3.7.0)
-      rspec-expectations (~> 3.7.0)
-      rspec-mocks (~> 3.7.0)
+    rspec (3.8.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
     rspec-collection_matchers (1.1.3)
       rspec-expectations (>= 2.99.0.beta1)
-    rspec-core (3.7.1)
-      rspec-support (~> 3.7.0)
-    rspec-expectations (3.7.0)
+    rspec-core (3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.7.0)
-    rspec-mocks (3.7.0)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.7.0)
-    rspec-rails (3.7.2)
+      rspec-support (~> 3.8.0)
+    rspec-rails (3.8.0)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.7.0)
-      rspec-expectations (~> 3.7.0)
-      rspec-mocks (~> 3.7.0)
-      rspec-support (~> 3.7.0)
-    rspec-support (3.7.1)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.0)
     shellany (0.0.1)
-    sprockets (3.7.1)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (2.3.3)
@@ -175,4 +175,4 @@ DEPENDENCIES
   wdm (<= 0.0.3)
 
 BUNDLED WITH
-   1.16.1
+   1.16.5
diff --git a/esendex.gemspec b/esendex.gemspec
index 3845176..a49443e 100644
--- a/esendex.gemspec
+++ b/esendex.gemspec
@@ -16,5 +16,5 @@ Gem::Specification.new do |gem|
   gem.version       = Esendex::VERSION
   gem.required_ruby_version = "~> 2.2"
   gem.add_runtime_dependency "nestful", ["~> 0.0.8"]
-  gem.add_runtime_dependency "nokogiri", ["~> 1.6.8.1"]
+  gem.add_runtime_dependency "nokogiri", ["~> 1.8"]
 end
diff --git a/lib/esendex/account.rb b/lib/esendex/account.rb
index 17a612d..6b27e3b 100644
--- a/lib/esendex/account.rb
+++ b/lib/esendex/account.rb
@@ -26,7 +26,7 @@ def send_message(args={})
       raise ArgumentError.new(":to required") unless args[:to]
       raise ArgumentError.new(":body required") unless args[:body]
 
-      send_messages [Message.new(args[:to], args[:body], args[:from])]
+      send_messages [Message.new(args[:to], args[:body], args[:from], args[:characterset])]
     end
     
     def send_messages(messages)
diff --git a/lib/esendex/message.rb b/lib/esendex/message.rb
index a90adc2..7aba32d 100644
--- a/lib/esendex/message.rb
+++ b/lib/esendex/message.rb
@@ -7,12 +7,13 @@
 
 module Esendex
   class Message
-    attr_accessor :to, :body, :from
+    attr_accessor :to, :body, :from, :characterset
     
-    def initialize(to, body, from=nil)
+    def initialize(to, body, from=nil, characterset=nil)
       @to = to
       @body = body
       @from = from
+      @characterset = characterset.nil? ? 'Auto' : characterset
     end
     
     def xml_node
@@ -32,6 +33,12 @@ def xml_node
         doc.root.add_child(from)
       end
 
+      if @characterset
+        characterset = Nokogiri::XML::Node.new 'characterset', doc
+        characterset.content = @characterset
+        doc.root.add_child(characterset)
+      end
+
       doc.root
     end
   end
diff --git a/lib/esendex/version.rb b/lib/esendex/version.rb
index 89ab835..921cd75 100644
--- a/lib/esendex/version.rb
+++ b/lib/esendex/version.rb
@@ -1,3 +1,3 @@
 module Esendex
-  VERSION = "0.6.0"
+  VERSION = "0.6.1"
 end
diff --git a/spec/message_spec.rb b/spec/message_spec.rb
index 5b9cb40..251e94f 100644
--- a/spec/message_spec.rb
+++ b/spec/message_spec.rb
@@ -5,7 +5,8 @@
     let(:to) { random_mobile }
     let(:from) { random_mobile }
     let(:body) { random_string }
-    let(:message) { Esendex::Message.new(to, body, from) }
+    let(:characterset) { 'Unicode' }
+    let(:message) { Esendex::Message.new(to, body, from, characterset) }
     
     it "should have to set" do
       expect(message.to).to eq(to)
@@ -18,12 +19,17 @@
     it "should have body set" do
       expect(message.body).to eq(body)
     end
+
+    it "should have characterset set" do
+      expect(message.characterset).to eq(characterset)
+    end
   end
   
   describe "#xml_node" do
     let(:to) { random_mobile }
     let(:body) { random_string }
-    let(:message) { Esendex::Message.new(to, body) }
+    let(:characterset) { 'Auto' }
+    let(:message) { Esendex::Message.new(to, body, ) }
 
     subject { message.xml_node }
 
@@ -45,5 +51,9 @@
         expect(subject.at_xpath('//message/from').content).to eq(from)
       end
     end
+
+    it "contains a characterset node" do
+      expect(subject.at_xpath('//message/characterset').content).to eq(characterset)
+    end
   end
 end