diff --git a/boards/forms.py b/boards/forms.py
--- a/boards/forms.py
+++ b/boards/forms.py
@@ -1,3 +1,4 @@
+import re
 from django import forms
 from neboard import settings
 
@@ -38,17 +39,17 @@ class PostForm(forms.Form):
 
 
 class ThreadForm(PostForm):
-    INVALID_TAG_CHARACTERS = ['+', '/', '&', '=', '?', '-', '.', ',']
+    regex_tags = re.compile(r'^[\w\s]+$')
 
     tags = forms.CharField(max_length=100)
 
     def clean_tags(self):
         tags = self.cleaned_data['tags']
+
         if tags:
-            for character in tags:
-                if character in self.INVALID_TAG_CHARACTERS:
-                    raise forms.ValidationError(
-                        'Inappropriate characters in tags')
+            if not self.regex_tags.match(tags):
+                raise forms.ValidationError(
+                    'Inappropriate characters in tags')
 
         return tags