diff --git a/README.md b/README.md
index c4c60a7..a57e6f1 100644
--- a/README.md
+++ b/README.md
@@ -227,6 +227,7 @@ Set environment variables:
 - **ZUGFeRD** - German e-invoicing format
 - **Factur-X** - French pdf+xml e-invoicing
 - **France-CTC** - French e-invoicing
+- **OIOUBL** - Danish e-invoicing (NemHandel)
 
 
 Many rule sets are deprecated so you may need to filter by status on your end.
diff --git a/pom.xml b/pom.xml
index bc7557a..c456c31 100644
--- a/pom.xml
+++ b/pom.xml
@@ -158,6 +158,13 @@
       <version>${phive-rules.version}</version>
     </dependency>
 
+    <!-- OIOUBL (Danish Public Information Online UBL — NemHandel) -->
+    <dependency>
+      <groupId>com.helger.phive.rules</groupId>
+      <artifactId>phive-rules-oioubl</artifactId>
+      <version>${phive-rules.version}</version>
+    </dependency>
+
     <!-- ZATCA (Saudi Arabia e-invoice) -->
     <dependency>
       <groupId>com.helger.phive.rules</groupId>
@@ -182,16 +189,6 @@
       <artifactId>phive-rules-finvoice</artifactId>
       <version>${phive-rules.version}</version>
     </dependency>
-    <dependency>
-      <groupId>com.helger.phive.rules</groupId>
-      <artifactId>phive-rules-oioubl</artifactId>
-      <version>${phive-rules.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>com.helger.phive.rules</groupId>
-      <artifactId>phive-rules-zugferd</artifactId>
-      <version>${phive-rules.version}</version>
-    </dependency>
     -->
 
     <!-- gRPC dependencies -->
diff --git a/src/main/java/config/PhiveRulesInitializer.java b/src/main/java/config/PhiveRulesInitializer.java
index ba8a157..c95d494 100644
--- a/src/main/java/config/PhiveRulesInitializer.java
+++ b/src/main/java/config/PhiveRulesInitializer.java
@@ -70,6 +70,9 @@ public void initialize() {
             // France CTC (Chorus Pro - French e-invoicing)
             registerRules("com.helger.phive.france.FranceCTCValidation", "initFranceCTC");
 
+            // OIOUBL (Danish Public Information Online UBL - NemHandel)
+            registerRules("com.helger.phive.oioubl.OIOUBLValidation", "initOIOUBL");
+
             // ZATCA (Saudi Arabia e-invoicing)
             registerRules("com.helger.phive.zatca.ZATCAValidation", "initZATCA");