diff --git a/examples/feed-generator-from-redis/MISPItemToRedis.py b/examples/feed-generator-from-redis/MISPItemToRedis.py
index 7c038b4..6fe729f 100644
--- a/examples/feed-generator-from-redis/MISPItemToRedis.py
+++ b/examples/feed-generator-from-redis/MISPItemToRedis.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import redis
 import json
 
diff --git a/examples/feed-generator-from-redis/fromredis.py b/examples/feed-generator-from-redis/fromredis.py
index e8d8584..d84fca1 100755
--- a/examples/feed-generator-from-redis/fromredis.py
+++ b/examples/feed-generator-from-redis/fromredis.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 import sys
diff --git a/examples/feed-generator-from-redis/generator.py b/examples/feed-generator-from-redis/generator.py
index ed88743..38a9d54 100755
--- a/examples/feed-generator-from-redis/generator.py
+++ b/examples/feed-generator-from-redis/generator.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 import json
diff --git a/pymisp/api.py b/pymisp/api.py
index 2526361..f2532c6 100644
--- a/pymisp/api.py
+++ b/pymisp/api.py
@@ -710,6 +710,10 @@ class PyMISP(object):
         """Add SNORT rule(s)"""
         return self.add_named_attribute(event, 'snort', snort, category, to_ids, comment, distribution, proposal, **kwargs)
 
+    def add_asn(self, event, asn, category='Network activity', to_ids=True, comment=None, distribution=None, proposal=False, **kwargs):
+        """Add network ASN"""
+        return self.add_named_attribute(event, 'AS', asn, category, to_ids, comment, distribution, proposal, **kwargs)
+
     def add_net_other(self, event, netother, category='Network activity', to_ids=True, comment=None, distribution=None, proposal=False, **kwargs):
         """Add a free text entry"""
         return self.add_named_attribute(event, 'other', netother, category, to_ids, comment, distribution, proposal, **kwargs)
diff --git a/pymisp/data/describeTypes.json b/pymisp/data/describeTypes.json
index 4ca5a83..f23bb8b 100644
--- a/pymisp/data/describeTypes.json
+++ b/pymisp/data/describeTypes.json
@@ -78,7 +78,7 @@
         "to_ids": 0
       },
       "url": {
-        "default_category": "External analysis",
+        "default_category": "Network activity",
         "to_ids": 1
       },
       "http-method": {