diff --git a/bases/rsptx/web2py_server/applications/runestone/models/db.py b/bases/rsptx/web2py_server/applications/runestone/models/db.py
index 66e467bb9..e2b82db91 100644
--- a/bases/rsptx/web2py_server/applications/runestone/models/db.py
+++ b/bases/rsptx/web2py_server/applications/runestone/models/db.py
@@ -386,6 +386,7 @@ def formatter(self, value):
 db.auth_user.username.requires = (
     HAS_NO_DOTS(),
     IS_NOT_IN_DB(db, db.auth_user.username),
+    IS_NOT_EMOJI(db.auth_user.username,f"Username cannot contain emojis")
 )
 db.auth_user.registration_id.requires = IS_NOT_IN_DB(db, db.auth_user.registration_id)
 db.auth_user.email.requires = (
diff --git a/bases/rsptx/web2py_server/gluon/packages/dal/pydal/validators.py b/bases/rsptx/web2py_server/gluon/packages/dal/pydal/validators.py
index 343a98d5b..6d0c9b83a 100644
--- a/bases/rsptx/web2py_server/gluon/packages/dal/pydal/validators.py
+++ b/bases/rsptx/web2py_server/gluon/packages/dal/pydal/validators.py
@@ -73,6 +73,7 @@
     "IS_UPPER",
     "IS_URL",
     "IS_JSON",
+    "IS_NOT_EMOJI",
 ]
 
 
@@ -157,6 +158,19 @@ def validator_caller(func, value, record_id=None):
         raise ValidationError(error)
     return value
 
+class IS_NOT_EMOJI(Validator):
+    """
+    """
+    def __init__(self,expression, error_message="Contains Emojis"):
+
+        self.expression = expression
+        self.error_message = error_message
+    def validate(self, value, record_id=None):
+        emoji_pattern = re.compile(r'[\U0001F600-\U0001F64F\U0001F300-\U0001F5FF\U0001F680-\U0001F6FF\U0001F700-\U0001F77F\U0001F780-\U0001F7FF\U0001F800-\U0001F8FF\U0001F900-\U0001F9FF\U0001FA00-\U0001FA6F\U0001FA70-\U0001FAFF]')
+
+        if emoji_pattern.search(value):
+            raise ValidationError(self.translator(self.error_message))
+        return value
 
 class IS_MATCH(Validator):
     """
@@ -202,7 +216,7 @@ def __init__(
         extract=False,
         is_unicode=False,
     ):
-
+    
         if strict or not search:
             if not expression.startswith("^"):
                 expression = "^(%s)" % expression