diff --git a/pastey/common.py b/pastey/common.py
index 3c65137..5c1130e 100644
--- a/pastey/common.py
+++ b/pastey/common.py
@@ -15,7 +15,7 @@ def verify_whitelist(ip):
 
     # Check blacklist
     for network in config.blacklist_cidr:
-        if address in ipaddress.IPv4Network(network):
+        if address in ipaddress.ip_network(network):
             return False
 
     if not config.use_whitelist:
@@ -23,7 +23,7 @@ def verify_whitelist(ip):
 
     # Check whitelist
     for network in config.whitelist_cidr:
-        if address in ipaddress.IPv4Network(network):
+        if address in ipaddress.ip_network(network):
             return True
     
     return False
@@ -106,4 +106,4 @@ def build_url(request, path="/"):
     else:
         protocol = request.url.split('//')[0] if not config.force_https_links else "https:"
 
-    return protocol + "//" + domain + path
\ No newline at end of file
+    return protocol + "//" + domain + path