diff --git a/README.md b/README.md
index 9b5ff91..cabb05b 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 EPICS is a ruby implementation of the [EBICS](https://www.ebics.org/) (Electronic Banking Internet
 Communication Standard).
 
-It supports EBICS 2.4 and 2.5.
+It supports EBICS 2.4, 2.5 and 3.0.
 
 The client supports the complete initialization process comprising INI, HIA and HPB including the
 INI letter generation. It offers support for the most common download and upload order types
diff --git a/lib/epics/client.rb b/lib/epics/client.rb
index 7705e11..9ed115e 100644
--- a/lib/epics/client.rb
+++ b/lib/epics/client.rb
@@ -11,10 +11,11 @@ class Epics::Client
 
   VERSION_H3 = 'H003'
   VERSION_H4 = 'H004'
+  VERSION_H5 = 'H005'
   VERSION_A5 = 'A005'
   VERSION_A6 = 'A006'
 
-  VERSIONS = [VERSION_H3, VERSION_H4]
+  VERSIONS = [VERSION_H3, VERSION_H4, VERSION_H5]
 
   USER_AGENT = "EPICS v#{Epics::VERSION}"
 
@@ -44,7 +45,7 @@ def urn_schema
     case version
     when VERSION_H3
       "http://www.ebics.org/#{version}"
-    when VERSION_H4
+    when VERSION_H4, VERSION_H5
       "urn:org:ebics:#{version}"
     end
   end