diff --git a/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/messages.properties b/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/messages.properties
index 7d9b0dc..981b074 100644
--- a/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/messages.properties
+++ b/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/messages.properties
@@ -30,4 +30,4 @@ createTenantRootGroupButton.caption=Generate group
 
 validation.cannotGenerateGroupNameIsNull=Please enter a tenant name first
 validation.tenantGroupAlreadyExist=Access group with the name "%s" already exists
-validation.invalidTenantId=The field "Tenant Id" must contain Latin letters, numbers or "_"
\ No newline at end of file
+validation.invalidTenantId=The field "Tenant Id" must contain Latin letters, numbers, "_" or "-"
\ No newline at end of file
diff --git a/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/validators/TenantIdValidator.java b/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/validators/TenantIdValidator.java
index 967edbf..0a0e498 100644
--- a/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/validators/TenantIdValidator.java
+++ b/modules/web/src/com/haulmont/addon/sdbmt/web/tenant/validators/TenantIdValidator.java
@@ -28,7 +28,7 @@ public class TenantIdValidator implements Field.Validator {
 
     @Override
     public void validate(Object value) throws ValidationException {
-        if (StringUtils.isNotEmpty((String) value) && !((String) value).matches("[\\w|\\s]+"))
+        if (StringUtils.isNotEmpty((String) value) && !((String) value).matches("[\\w|\\s\\-]+"))
             throw new ValidationException(messages.getMessage(TenantIdValidator.class, "validation.invalidTenantId"));
     }
 }