diff --git a/BuildingBlocks/src/DevelopmentKit.Identity/ValueObjects/IdentityAddress.cs b/BuildingBlocks/src/DevelopmentKit.Identity/ValueObjects/IdentityAddress.cs
index 079feaebe1..44ce54fbf8 100644
--- a/BuildingBlocks/src/DevelopmentKit.Identity/ValueObjects/IdentityAddress.cs
+++ b/BuildingBlocks/src/DevelopmentKit.Identity/ValueObjects/IdentityAddress.cs
@@ -130,7 +130,7 @@ public static implicit operator IdentityAddress(string stringValue)
         return ParseUnsafe(stringValue);
     }
 
-    [GeneratedRegex($@"^(?<addressWithoutChecksum>did:e:(?<didDomainName>(?:[a-z0-9]+\.)*[a-z]{{2,}}):dids:(?<identitySpecificPart>[0-9a-f]{{20}}))(?<checksum>[0-9a-f]{{{CHECKSUM_LENGTH_S}}})$")]
+    [GeneratedRegex($@"^(?<addressWithoutChecksum>did:e:(?<didDomainName>(?:[a-z0-9-]+\.)*[a-z]{{2,}}):dids:(?<identitySpecificPart>[0-9a-f]{{20}}))(?<checksum>[0-9a-f]{{{CHECKSUM_LENGTH_S}}})$")]
     public static partial Regex IdentityAddressValidatorRegex();
 
     #endregion
diff --git a/BuildingBlocks/test/DevelopmentKit.Identity.Tests/IdentityAddressTests.cs b/BuildingBlocks/test/DevelopmentKit.Identity.Tests/IdentityAddressTests.cs
index 88352edf2b..55503ee1b9 100644
--- a/BuildingBlocks/test/DevelopmentKit.Identity.Tests/IdentityAddressTests.cs
+++ b/BuildingBlocks/test/DevelopmentKit.Identity.Tests/IdentityAddressTests.cs
@@ -70,6 +70,14 @@ public void ValidAddressesAreAccepted()
         isValid.Should().BeTrue();
     }
 
+    [Fact]
+    public void DashesAreAllowedCharactersInDomainNames()
+    {
+        var isValid = IdentityAddress.IsValid("did:e:bkb-nmshd-preprod.nbpdev.de:dids:a75bf465d17e972367a986");
+
+        isValid.Should().BeTrue();
+    }
+
     [Fact]
     public void AddressesWithInvalidChecksumAreDeclined()
     {