diff --git a/ckan/config/middleware/flask_app.py b/ckan/config/middleware/flask_app.py
index 8a6d6184685..4293d82b378 100644
--- a/ckan/config/middleware/flask_app.py
+++ b/ckan/config/middleware/flask_app.py
@@ -206,6 +206,8 @@ def hello_world_post():
         app = plugin.make_middleware(app, config)
 
     # Fanstatic
+    fanstatic_enable_rollup = asbool(app_conf.get('fanstatic_enable_rollup',
+                                                  False))
     if debug:
         fanstatic_config = {
             'versioning': True,
@@ -213,6 +215,7 @@ def hello_world_post():
             'minified': False,
             'bottom': True,
             'bundle': False,
+            'rollup': fanstatic_enable_rollup,
         }
     else:
         fanstatic_config = {
@@ -221,6 +224,7 @@ def hello_world_post():
             'minified': True,
             'bottom': True,
             'bundle': True,
+            'rollup': fanstatic_enable_rollup,
         }
     root_path = config.get('ckan.root_path', None)
     if root_path:
diff --git a/ckan/config/middleware/pylons_app.py b/ckan/config/middleware/pylons_app.py
index 2d352324101..73b714509a7 100644
--- a/ckan/config/middleware/pylons_app.py
+++ b/ckan/config/middleware/pylons_app.py
@@ -75,6 +75,8 @@ def make_pylons_stack(conf, full_stack=True, static_files=True,
                                     cleanup_pylons_response_string)
 
     # Fanstatic
+    fanstatic_enable_rollup = asbool(app_conf.get('fanstatic_enable_rollup',
+                                                  False))
     if asbool(config.get('debug', False)):
         fanstatic_config = {
             'versioning': True,
@@ -82,6 +84,7 @@ def make_pylons_stack(conf, full_stack=True, static_files=True,
             'minified': False,
             'bottom': True,
             'bundle': False,
+            'rollup': fanstatic_enable_rollup,
         }
     else:
         fanstatic_config = {
@@ -90,6 +93,7 @@ def make_pylons_stack(conf, full_stack=True, static_files=True,
             'minified': True,
             'bottom': True,
             'bundle': True,
+            'rollup': fanstatic_enable_rollup,
         }
     root_path = config.get('ckan.root_path', None)
     if root_path:
diff --git a/ckan/lib/fanstatic_resources.py b/ckan/lib/fanstatic_resources.py
index aa010be9495..a0d4ad9e7a6 100644
--- a/ckan/lib/fanstatic_resources.py
+++ b/ckan/lib/fanstatic_resources.py
@@ -38,7 +38,7 @@ def get_resource(lib_name, resource_name):
             res = getattr(module, '%s' % resource_name)
         return res
 
-    def create_resource(path, lib_name, count, inline=False):
+    def create_resource(path, lib_name, count, inline=False, supersedes=None):
         ''' create the fanstatic Resource '''
         renderer = None
         kw = {}
@@ -83,6 +83,12 @@ def create_resource(path, lib_name, count, inline=False):
                 script=inline,
                 renderer=renderer,
                 other_browsers=other_browsers)
+        if supersedes:
+            superseded_library, superseded_resource_path = supersedes
+            for _library in get_library_registry().values():
+                if _library.name == superseded_library:
+                    kw['supersedes'] = [_library.known_resources[superseded_resource_path]]
+                    break
         resource = Resource(library, path, **kw)
 
         # Add our customised ordering
@@ -116,6 +122,7 @@ def create_resource(path, lib_name, count, inline=False):
     IE_conditionals = {}
     custom_render_order = {}
     inline_scripts = {}
+    supersedes = {}
 
     # parse the resource.config file if it exists
     config_path = os.path.join(resource_path, 'resource.config')
@@ -150,6 +157,9 @@ def create_resource(path, lib_name, count, inline=False):
                     if f not in IE_conditionals:
                         IE_conditionals[f] = []
                     IE_conditionals[f].append(n)
+        if config.has_section('supersedes'):
+            items = config.items('supersedes')
+            supersedes = dict((n, v.split('/', 1)) for (n, v) in items)
 
     # add dependencies for resources in groups
     for group in groups:
@@ -210,7 +220,8 @@ def create_resource(path, lib_name, count, inline=False):
             inline = inline_scripts[resource_name].strip()
         else:
             inline = None
-        create_resource(resource_name, name, count, inline=inline)
+        create_resource(resource_name, name, count, inline=inline,
+                        supersedes=supersedes.get(resource_name))
         count += 1
 
     # add groups
diff --git a/doc/contributing/frontend/resources.rst b/doc/contributing/frontend/resources.rst
index 5abff1b4626..eb93fad8ef1 100644
--- a/doc/contributing/frontend/resources.rst
+++ b/doc/contributing/frontend/resources.rst
@@ -111,6 +111,11 @@ the same as for the .ini config file.
         bootstrap/js/bootstrap-button.js
         font-awesome/css/font-awesome-ie7.css
 
+    [supersedes]
+
+    select2-upgraded.js = vendor/select2/select2.js
+
+
 
 [main]
 ~~~~~~
@@ -187,3 +192,9 @@ used.
 
 Groups can be referred to in many places in the
 resource.config file eg. [depends]
+
+[supersedes]
+~~~~~~~~~~~~
+
+Allows to override static files from other resources. Has to be enabled at the
+app config by setting fanstatic_enable_rollup = yes