diff --git a/src/main/java/info/bukova/isspst/data/Invoicing.java b/src/main/java/info/bukova/isspst/data/Invoicing.java
index f6d81b8c..19dfdfb5 100644
--- a/src/main/java/info/bukova/isspst/data/Invoicing.java
+++ b/src/main/java/info/bukova/isspst/data/Invoicing.java
@@ -1,7 +1,7 @@
 package info.bukova.isspst.data;
 
-import java.math.BigDecimal;
-import java.util.List;
+import org.hibernate.annotations.LazyCollection;
+import org.hibernate.annotations.LazyCollectionOption;
 
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
@@ -11,16 +11,15 @@ import javax.persistence.JoinColumn;
 import javax.persistence.OneToMany;
 import javax.persistence.OneToOne;
 import javax.persistence.Table;
-
-import org.hibernate.annotations.LazyCollection;
-import org.hibernate.annotations.LazyCollectionOption;
+import java.math.BigDecimal;
+import java.util.List;
 
 @Entity
 @Table(name = "INVOICING")
 public class Invoicing extends BaseData implements Cloneable
 {
 	
-	@OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+	@OneToOne(fetch = FetchType.EAGER)
 	@JoinColumn(name = "REQUIREMENT_ID")
 	private Requirement requirement;
 	
diff --git a/src/main/java/info/bukova/isspst/services/invoicing/InvoicingService.java b/src/main/java/info/bukova/isspst/services/invoicing/InvoicingService.java
index 84583cc9..414ed36f 100644
--- a/src/main/java/info/bukova/isspst/services/invoicing/InvoicingService.java
+++ b/src/main/java/info/bukova/isspst/services/invoicing/InvoicingService.java
@@ -1,6 +1,7 @@
 package info.bukova.isspst.services.invoicing;
 
 import info.bukova.isspst.data.Invoicing;
+import info.bukova.isspst.data.Requirement;
 import info.bukova.isspst.data.Workgroup;
 import info.bukova.isspst.services.Service;
 
@@ -20,4 +21,6 @@ public interface InvoicingService extends Service<Invoicing> {
 	public List<Invoicing> getPendingList();
 
 	public List<Invoicing> getArchiveList();
+
+	public Invoicing getForRequirement(Requirement req);
 }
diff --git a/src/main/java/info/bukova/isspst/services/invoicing/InvoicingServiceImpl.java b/src/main/java/info/bukova/isspst/services/invoicing/InvoicingServiceImpl.java
index 98124d3d..7386188c 100644
--- a/src/main/java/info/bukova/isspst/services/invoicing/InvoicingServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/invoicing/InvoicingServiceImpl.java
@@ -2,18 +2,18 @@ package info.bukova.isspst.services.invoicing;
 
 import info.bukova.isspst.data.Invoicing;
 import info.bukova.isspst.data.InvoicingItem;
+import info.bukova.isspst.data.Requirement;
 import info.bukova.isspst.data.Workgroup;
 import info.bukova.isspst.services.AbstractOwnedService;
 import info.bukova.isspst.services.LazyLoader;
-
-import java.math.BigDecimal;
-import java.util.List;
-
 import org.hibernate.Hibernate;
 import org.hibernate.Query;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.math.BigDecimal;
+import java.util.List;
+
 public class InvoicingServiceImpl extends AbstractOwnedService<Invoicing> implements
 		InvoicingService {
 
@@ -92,4 +92,13 @@ public class InvoicingServiceImpl extends AbstractOwnedService<Invoicing> implem
 		Query q = dao.getQuery("select inv from Invoicing as inv join fetch inv.requirement rq join fetch rq.ownedBy where inv.completed = true order by rq.numser");
 		return q.list();
 	}
+
+	@Override
+	@Transactional
+	public Invoicing getForRequirement(Requirement req) {
+		Query query = dao.getQuery("select invoice from Invoicing invoice join invoice.requirement rq where rq.id = :reqId");
+		query.setParameter("reqId", req.getId());
+
+		return (Invoicing) query.uniqueResult();
+	}
 }
diff --git a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
index 857857b0..a1dc8aa5 100644
--- a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
@@ -11,8 +11,8 @@ import info.bukova.isspst.data.Workflow;
 import info.bukova.isspst.services.LazyLoader;
 import info.bukova.isspst.services.invoicing.InvoicingService;
 import org.hibernate.Hibernate;
-import org.hibernate.Query;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
@@ -244,11 +244,19 @@ public class RequirementServiceImpl extends RequirementBaseServiceImpl<Requireme
 	@Override
 	@Transactional
 	public BigDecimal getInvoicedAmount(Requirement req) {
-		Query query = dao.getQuery("select invoice from Invoicing invoice join invoice.requirement rq where rq.id = :reqId");
-		query.setParameter("reqId", req.getId());
-		
-		Invoicing inv = (Invoicing) query.uniqueResult();
-		
+		Invoicing inv = invoicingService.getForRequirement(req);
 		return inv != null ? inv.getTotalInvoiced() : null;
 	}
+
+	@Override
+	@Transactional
+	@PreAuthorize("hasPermission(this, 'PERM_EDIT') or hasPermission(#entity, this.getUpdateEntityPermission())")
+	public void update(Requirement entity) {
+		super.update(entity);
+		Invoicing inv = invoicingService.getForRequirement(entity);
+
+		if (inv != null) {
+			invoicingService.delete(inv);
+		}
+	}
 }