diff --git a/MANIFEST.in b/MANIFEST.in
index 58cd8c0b66e30a6f443d5924196f4f6205d3d443..22092fd9c1b385e7ee8d59d05738c19a369e3f26 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -12,6 +12,7 @@ graft modcc
 graft python
 graft sup
 graft test
+graft arborio
 
 prune ext/sphinx_rtd_theme
 prune ext/google-benchmark
diff --git a/VERSION b/VERSION
index 1351681fa791a0484a2951d17c33dc5931346d0b..2eb3c4fe4eebcdea3da0790cc0ba74cb286ec4f4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.4.1-dev
+0.5
diff --git a/setup.py b/setup.py
index 950d190905d6fac6d73f5968579cc5d23e6ef4f6..8d62906ade5d3d80080539569da8deca9a239eb3 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,8 @@ class CL_opt:
             CL_opt.instance = {'mpi': False,
                                'gpu': 'none',
                                'vec': False,
-                               'arch': 'native'}
+                               'arch': 'native',
+                               'bundled': True}
 
     def settings(self):
         return CL_opt.instance
@@ -111,7 +112,7 @@ class cmake_build(build_ext):
             '-DARB_VECTORIZE={}'.format('on' if opt['vec'] else 'off'),
             '-DARB_ARCH={}'.format(opt['arch']),
             '-DARB_GPU={}'.format(opt['gpu']),
-            '-DARB_USE_BUNDLED_LIBS={}'.format('on' if opt['bundled'] else 'off']),
+            '-DARB_USE_BUNDLED_LIBS={}'.format('on' if opt['bundled'] else 'off'),
             '-DCMAKE_BUILD_TYPE=Release' # we compile with debug symbols in release mode.
         ]