diff --git a/local/config/vufind/httpd-vufind.conf b/local/config/vufind/httpd-vufind.conf
index 4d9d1f3..62933ac 100644
--- a/local/config/vufind/httpd-vufind.conf
+++ b/local/config/vufind/httpd-vufind.conf
@@ -155,7 +155,7 @@ Alias /resources /usr/local/vufind/public
 <Location /resources>
     RewriteEngine On
 
-    RewriteCond %{REMOTE_ADDR} ^47\.76\.35\.19$
+    RewriteCond expr "-R '43.0.0.0/8'"
     RewriteRule .* - [F]
     RewriteCond %{REQUEST_FILENAME} -s [OR]
     RewriteCond %{REQUEST_FILENAME} -l [OR]