diff --git a/facebook/classes.py b/facebook/classes.py
index 8249d87..a601bac 100644
--- a/facebook/classes.py
+++ b/facebook/classes.py
@@ -11,7 +11,7 @@ from robobrowser import RoboBrowser
 
 from arangodb import db
 from config import *
-from helpers import sleep_, update_cookie
+from helpers import sleep_, update_cookie, clean
 
 
 class User:
@@ -34,7 +34,7 @@ class User:
         db.insert_document(
             self.collection,
             {
-                "_key": self.username,
+                "_key": clean(self.username),
                 "url": self.url,
                 "name": self.name,
                 "profile_pictures": self.profile_pictures,
@@ -197,7 +197,7 @@ class Friend:
         db.insert_document(
             self.collection,
             {
-                "_key": self.username,
+                "_key": clean(self.username),
                 "url": url_bas + self.url,
                 "name": self.name,
             },
@@ -215,10 +215,10 @@ class Reaction:
         self.type = False
 
     def get_dict(self):
-        key = str(self.picture_id) + "_" + str(self.user_name_friend)
+        key = clean(str(self.picture_id) + "_" + str(self.user_name_friend))
         return {
-            "_to": "members/" + str(self.user),
-            "_from": "members/" + str(self.user_name_friend),
+            "_to": "members/" + clean(str(self.user)),
+            "_from": "members/" + clean(str(self.user_name_friend)),
             "_key": key,
             "_id": "picture_reactions/" + key,
             "picture": self.picture_id,
diff --git a/facebook/helpers.py b/facebook/helpers.py
index cd9f6b9..9259041 100644
--- a/facebook/helpers.py
+++ b/facebook/helpers.py
@@ -2,6 +2,7 @@ import pickle
 import random
 from datetime import datetime
 from time import sleep
+import re
 
 from arangodb import db
 
@@ -71,3 +72,6 @@ def write_error(nr, e="", traceback="", soup="", user="", url="", url_name=""):
         )
     except Exception as e:
         print(e)
+
+def clean(string):
+    return ''.join(re.findall('[A-Za-z0-9-:.@()+,=;$!*\s]+', string))
\ No newline at end of file