diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index b18de65a2e..65e174d27d 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -12,13 +12,17 @@ def validate_user(username, minlen):
     # Usernames can't be shorter than minlen
     if len(username) < minlen:
         return False
-    # Usernames can only use letters, numbers, dots and underscores
-    if not re.match('^[a-z0-9._]*$', username):
+    # Usernames must start with a letter 
+    if not username[0].isalpha():
         return False
-    # Usernames can't begin with a number
-    if username[0].isnumeric():
+    # Usernames can only use letters, numbers, dots and underscores
+    if not re.match(r'^[a-z0-9._]*$', username):
         return False
     return True
+print(validate_user("blue.kale", 3)) # True
+print(validate_user(".blue.kale", 3)) # Currently True, should be False
+print(validate_user("red_quinoa", 4)) # True
+print(validate_user("_red_quinoa", 4)) # Currently True, should be False