diff --git a/tableauserverclient/models/property_decorators.py b/tableauserverclient/models/property_decorators.py
index 1b3b7ccaa..de8fe8d8c 100644
--- a/tableauserverclient/models/property_decorators.py
+++ b/tableauserverclient/models/property_decorators.py
@@ -1,3 +1,4 @@
+import re
 from functools import wraps
 
 
@@ -84,3 +85,17 @@ def wrapper(self, value):
         return wrapper
 
     return property_type_decorator
+
+
+def property_matches(regex_to_match, error):
+
+    compiled_re = re.compile(regex_to_match)
+
+    def wrapper(func):
+        @wraps(func)
+        def validate_regex_decorator(self, value):
+            if not compiled_re.match(value):
+                raise ValueError(error)
+            return func(self, value)
+        return validate_regex_decorator
+    return wrapper
diff --git a/tableauserverclient/models/site_item.py b/tableauserverclient/models/site_item.py
index 283eca192..40a49e453 100644
--- a/tableauserverclient/models/site_item.py
+++ b/tableauserverclient/models/site_item.py
@@ -1,8 +1,12 @@
 import xml.etree.ElementTree as ET
-from .property_decorators import property_is_enum, property_is_boolean, property_not_empty, property_not_nullable
+from .property_decorators import (property_is_enum, property_is_boolean, property_matches,
+                                  property_not_empty, property_not_nullable)
 from .. import NAMESPACE
 
 
+VALID_CONTENT_URL_RE = r"^[a-zA-Z0-9_\-]*$"
+
+
 class SiteItem(object):
     class AdminMode:
         ContentAndUsers = 'ContentAndUsers'
@@ -45,6 +49,7 @@ def content_url(self):
 
     @content_url.setter
     @property_not_nullable
+    @property_matches(VALID_CONTENT_URL_RE, "content_url can contain only letters, numbers, dashes, and underscores")
     def content_url(self, value):
         self._content_url = value
 
diff --git a/test/test_site_model.py b/test/test_site_model.py
index 02735ed8c..99fa73ce9 100644
--- a/test/test_site_model.py
+++ b/test/test_site_model.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 import unittest
 import tableauserverclient as TSC
 
@@ -19,10 +21,21 @@ def test_invalid_admin_mode(self):
             site.admin_mode = "Hello"
 
     def test_invalid_content_url(self):
-        self.assertRaises(ValueError, TSC.SiteItem, "site", None)
-        site = TSC.SiteItem("site", "url")
+
         with self.assertRaises(ValueError):
-            site.content_url = None
+            site = TSC.SiteItem(name="蚵仔煎", content_url="蚵仔煎")
+
+        with self.assertRaises(ValueError):
+            site = TSC.SiteItem(name="蚵仔煎", content_url=None)
+
+    def test_set_valid_content_url(self):
+        # Default Site
+        site = TSC.SiteItem(name="Default", content_url="")
+        self.assertEqual(site.content_url, "")
+
+        # Unicode Name and ascii content_url
+        site = TSC.SiteItem(name="蚵仔煎", content_url="omlette")
+        self.assertEqual(site.content_url, "omlette")
 
     def test_invalid_disable_subscriptions(self):
         site = TSC.SiteItem("site", "url")