diff --git a/hsarback/src/de/hsadmin/mods/dom/Domain.java b/hsarback/src/de/hsadmin/mods/dom/Domain.java
index 2e3a4b7..0133dc2 100644
--- a/hsarback/src/de/hsadmin/mods/dom/Domain.java
+++ b/hsarback/src/de/hsadmin/mods/dom/Domain.java
@@ -32,7 +32,7 @@ public class Domain extends AbstractEntity {
 	@GeneratedValue(strategy = SEQUENCE, generator = "DomainsSeqGen")
 	private long id;
 
-	@FieldValidation("[a-z0-9\\-\\.]*")
+	@FieldValidation("([-a-z0-9]+\\.)+[a-z]{2,}")
 	@Column(name = "domain_name", columnDefinition = "character varying(256)", nullable = false)
 	private String name;