diff --git a/bin/compose_plantuml b/bin/compose_plantuml
index 310394e..79ee54c 100755
--- a/bin/compose_plantuml
+++ b/bin/compose_plantuml
@@ -16,6 +16,11 @@ if __name__ == '__main__':
         help='prints the system boundaries',
         default=False,
     )
+    parser.add_argument(
+        '--group', action='store_const', const=True,
+        help='group similar properties together',
+        default=False,
+    )
     parser.add_argument('files', nargs=argparse.REMAINDER)
     args = parser.parse_args()
     plantuml = ComposePlantuml()
@@ -30,7 +35,7 @@ if __name__ == '__main__':
         if args.link_graph:
             print(plantuml.link_graph(parsed))
         if args.boundaries:
-            print(plantuml.boundaries(parsed))
+            print(plantuml.boundaries(parsed, args.group))
 
     if len(args.files) == 0:
         execute(sys.stdin.read())
diff --git a/compose_plantuml/__init__.py b/compose_plantuml/__init__.py
index b2681cb..24f8086 100755
--- a/compose_plantuml/__init__.py
+++ b/compose_plantuml/__init__.py
@@ -21,7 +21,7 @@ def link_graph(self, compose):
             result += '[{0}] ..> [{1}] : depends on\n'.format(source, destination)
         return result.strip()
 
-    def boundaries(self, compose):
+    def boundaries(self, compose, group=False):
         result = 'skinparam componentStyle uml2\n'
 
         result += 'cloud system {\n'
@@ -31,25 +31,32 @@ def boundaries(self, compose):
         result += '}\n'
         volume_registry = {}
 
+        volume_uml = ''
         for volume in sorted(self.volumes(compose)):
             if not self.is_volume_used(compose, volume):
                 continue
-            result += 'database {0}'.format(volume) + ' {\n'
+            volume_uml += 'database {0}'.format(volume) + ' {\n'
             for path in sorted(self.volume_usage(compose, volume)):
                 id = self.volume_identifier(volume, path)
 
                 if id in volume_registry:
                     continue
                 volume_registry[id] = 'volume_{0}'.format(len(volume_registry.keys()) + 1)
-                result += '  [{0}] as {1}\n'.format(path, volume_registry[id])
+                volume_uml += '  [{0}] as {1}\n'.format(path, volume_registry[id])
 
-            result += '}\n'
+            volume_uml += '}\n'
+        result += self.group('volumes', volume_uml) if group else volume_uml
 
+        port_uml = ''
+        port_links = ''
         for service, host, container in sorted(self.ports(compose)):
             port = host
             if container is not None:
                 port = '{0} : {1}'.format(host, container)
-            result += '[{0}] --> {1}\n'.format(service, port)
+            port_links += '[{0}] --> {1}\n'.format(service, port)
+            port_uml += 'interface {0}\n'.format(port)
+        result += self.group('ports', port_uml) if group else ''
+        result += port_links
 
         for volume in sorted(self.volumes(compose)):
             for service, volume_path in sorted(self.service_using_path(compose, volume)):
@@ -59,6 +66,12 @@ def boundaries(self, compose):
                 result += '[{0}] --> {1}\n'.format(service, name)
         return result.strip()
 
+    @staticmethod
+    def group(name, content):
+        if len(content) == 0:
+            return ''
+        return 'package {0} '.format(name) + '{\n  ' + '\n  '.join(content.split('\n')).strip() + '\n}\n'
+
     @staticmethod
     def is_volume_used(compose, volume):
         components = compose if 'version' not in compose else compose.get('services', {})
diff --git a/features/boundaries.feature b/features/boundaries.feature
index 5abae81..6958fc9 100644
--- a/features/boundaries.feature
+++ b/features/boundaries.feature
@@ -95,6 +95,41 @@ Feature: Boundaries
 
       """
 
+  Scenario: Group Volumes and Ports
+    Given a file named "compose.yml" with:
+      """
+      version: "2"
+      services:
+        service:
+          volumes:
+            - service_log:/log
+          ports:
+           - 8080
+        unused_service: {}
+      volumes:
+        service_log: {}
+        unused_volume: {}
+      """
+    When I run `bin/compose_plantuml --boundaries --group compose.yml`
+    Then it should pass with exactly:
+      """
+      skinparam componentStyle uml2
+      cloud system {
+        [service]
+      }
+      package volumes {
+        database service_log {
+          [/log] as volume_1
+        }
+      }
+      package ports {
+        interface 8080
+      }
+      [service] --> 8080
+      [service] --> volume_1
+
+      """
+
   Scenario: Suppport for legacy docker-compose format
     Given a file named "compose.yml" with:
       """
diff --git a/setup.py b/setup.py
index e78156d..b5f06d3 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ def readme():
 
 setup(
     name='compose_plantuml',
-    version='0.0.8',
+    version='0.0.9',
     description='converts docker-compose into plantuml',
     long_description=readme(),
     url='http://github.com/funkwerk/compose_plantuml',