diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..0c4cefb
Binary files /dev/null and b/.DS_Store differ
diff --git a/estonian_e_invoice.gemspec b/estonian_e_invoice.gemspec
index d1e098e..319549c 100644
--- a/estonian_e_invoice.gemspec
+++ b/estonian_e_invoice.gemspec
@@ -5,8 +5,8 @@ require 'e_invoice/version'
 Gem::Specification.new do |spec|
   spec.name = 'e_invoice'
   spec.version = EInvoice::VERSION
-  spec.authors = ['Artur Beljajev', 'Maciej Szlosarczyk', 'Sergei Tsõganov']
-  spec.email = ['artur.beljajev@internet.ee', 'maciej.szlosarczyk@internet.ee', 'sergei.tsoganov@internet.ee']
+  spec.authors = ['Artur Beljajev', 'Maciej Szlosarczyk', 'Sergei Tsõganov', 'Oleg Hasjanov']
+  spec.email = ['artur.beljajev@internet.ee', 'maciej.szlosarczyk@internet.ee', 'sergei.tsoganov@internet.ee', 'oleg.hasjanov@internet.ee']
   spec.summary = 'Ruby API for generating and delivering Estonian e-invoices'
   spec.homepage = 'https://github.com/internetee/e_invoice'
   spec.license = 'MIT'
diff --git a/lib/e_invoice/providers/omniva_provider.rb b/lib/e_invoice/providers/omniva_provider.rb
index a8fe085..ebb958d 100644
--- a/lib/e_invoice/providers/omniva_provider.rb
+++ b/lib/e_invoice/providers/omniva_provider.rb
@@ -1,11 +1,14 @@
+require 'logger'
+
 module EInvoice
   module Providers
     class OmnivaProvider
-      attr_reader :config, :soap_client
+      attr_reader :config, :soap_client, :logger
 
-      def initialize(provider_config_user)
+      def initialize(provider_config_user, logger = nil)
         @config = OpenStruct.new(provider_config.merge(provider_config_user))
         @soap_client = Savon.client(wsdl: wsdl)
+        @logger = logger || Logger.new($stdout)
       end
 
       def wsdl
@@ -18,7 +21,11 @@ def wsdl
 
       def deliver(e_invoice)
         message = normalize_e_invoice_xml(e_invoice.to_xml)
-        soap_client.call(soap_operation, attributes: soap_attributes, message: message)
+        logger.info("[OmnivaProvider] Sending e-invoice with message: #{message}")
+        logger.info("[OmnivaProvider] SOAP attributes: #{soap_attributes}")
+        response = soap_client.call(soap_operation, attributes: soap_attributes, message: message)
+        logger.info("[OmnivaProvider] Received response: #{response.body}")
+        response
       end
 
       private
diff --git a/lib/e_invoice/version.rb b/lib/e_invoice/version.rb
index ce30362..cce935d 100644
--- a/lib/e_invoice/version.rb
+++ b/lib/e_invoice/version.rb
@@ -1,3 +1,3 @@
 module EInvoice
-  VERSION = '0.1.5'.freeze
+  VERSION = '0.1.6'.freeze
 end
diff --git a/test/.DS_Store b/test/.DS_Store
new file mode 100644
index 0000000..4efd133
Binary files /dev/null and b/test/.DS_Store differ