diff --git a/lib/processout/invoice_device.rb b/lib/processout/invoice_device.rb
index 65a07ef..14a253f 100755
--- a/lib/processout/invoice_device.rb
+++ b/lib/processout/invoice_device.rb
@@ -9,6 +9,7 @@ module ProcessOut
   class InvoiceDevice
     
     attr_reader :channel
+    attr_reader :threeds_sdk
     attr_reader :platform
     attr_reader :ip_address
     attr_reader :id
@@ -18,6 +19,10 @@ def channel=(val)
       @channel = val
     end
     
+    def threeds_sdk=(val)
+      @threeds_sdk = val
+    end
+    
     def platform=(val)
       @platform = val
     end
@@ -39,6 +44,7 @@ def initialize(client, data = {})
       @client = client
 
       self.channel = data.fetch(:channel, nil)
+      self.threeds_sdk = data.fetch(:threeds_sdk, nil)
       self.platform = data.fetch(:platform, nil)
       self.ip_address = data.fetch(:ip_address, nil)
       self.id = data.fetch(:id, nil)
@@ -54,6 +60,7 @@ def new(data = {})
     def to_json(options)
       {
           "channel": self.channel,
+          "threeds_sdk": self.threeds_sdk,
           "platform": self.platform,
           "ip_address": self.ip_address,
           "id": self.id,
@@ -70,6 +77,9 @@ def fill_with_data(data)
       if data.include? "channel"
         self.channel = data["channel"]
       end
+      if data.include? "threeds_sdk"
+        self.threeds_sdk = data["threeds_sdk"]
+      end
       if data.include? "platform"
         self.platform = data["platform"]
       end
@@ -91,6 +101,7 @@ def prefill(data)
         return self
       end
       self.channel = data.fetch(:channel, self.channel)
+      self.threeds_sdk = data.fetch(:threeds_sdk, self.threeds_sdk)
       self.platform = data.fetch(:platform, self.platform)
       self.ip_address = data.fetch(:ip_address, self.ip_address)
       self.id = data.fetch(:id, self.id)
diff --git a/lib/processout/networking/request.rb b/lib/processout/networking/request.rb
index c89d715..918d83c 100644
--- a/lib/processout/networking/request.rb
+++ b/lib/processout/networking/request.rb
@@ -13,7 +13,7 @@ def apply_headers(req, options)
       req.basic_auth @client.project_id, @client.project_secret
       req.content_type = "application/json"
       req["API-Version"] = "1.4.0.0"
-      req["User-Agent"] = "ProcessOut Ruby-Bindings/6.0.0"
+      req["User-Agent"] = "ProcessOut Ruby-Bindings/6.0.1"
 
       unless options.nil?
         req["Idempotency-Key"] = options.fetch(:idempotency_key, "")
diff --git a/lib/processout/version.rb b/lib/processout/version.rb
index 67dce35..278caa4 100644
--- a/lib/processout/version.rb
+++ b/lib/processout/version.rb
@@ -1,3 +1,3 @@
 module ProcessOut
-  VERSION = "6.0.0"
+  VERSION = "6.0.1"
 end
diff --git a/processout.gemspec b/processout.gemspec
index 0f6be93..fa444c1 100644
--- a/processout.gemspec
+++ b/processout.gemspec
@@ -13,6 +13,8 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://docs.processout.com"
   spec.license       = "MIT"
 
+  spec.metadata["rubygems_mfa_required"] = "true"
+
   spec.files         = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end