diff --git a/shop.py b/shop.py
index fe0bce9..8e4bcce 100644
--- a/shop.py
+++ b/shop.py
@@ -262,7 +262,7 @@ def add_shop():
     if not session.get('logged_in'):
         abort(401)
     import re, string
-    pattern = re.compile('[\W_]+')
+    pattern = re.compile('[\W]+')
     shopname=pattern.sub('', request.form['shop'])
     if shopname=="":
         flash('Shop name empty!')
@@ -288,7 +288,7 @@ def add_share():
     if not session.get('logged_in'):
         abort(401)
     import re, string
-    pattern = re.compile('[\W_]+')
+    pattern = re.compile('[\W]+')
     username=pattern.sub('', request.form['share'])
     shopid=pattern.sub('', request.form['shopid'])
     if username=="":
@@ -313,7 +313,7 @@ def remove_share():
     if not session.get('logged_in'):
         abort(401)
     import re, string
-    pattern = re.compile('[\W_]+')
+    pattern = re.compile('[\W]+')
     username=pattern.sub('', request.form['user'])
     shopid=pattern.sub('', request.form['shopid'])
     if username=="":
@@ -382,7 +382,7 @@ def register():
     error = None
     if request.method == 'POST':
         import re, string
-        pattern = re.compile('[\W_]+')
+        pattern = re.compile('[\W]+')
         username=pattern.sub('', request.form['username']) 
         password=password_hash(request.form['password'])
         if len(username)==0: