diff --git a/.gitignore b/.gitignore
index 993c1e5..cf84dc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ __pycache__
 *.pyc
 *.npz
 *.mtx
+*.so
 junk
 build/*
 *egg-info
diff --git a/README.rst b/README.rst
index b209c41..db605ef 100644
--- a/README.rst
+++ b/README.rst
@@ -74,7 +74,7 @@ Enter the newly created 'QSW_MPI/dist' folder, which should contain the archive
 
 .. code-block::
 
-    pip3 install qsw_mpi-0.0.1.tar.gz
+    pip3 install qsw_mpi-1.0.2.tar.gz
 
 Documentation
 -------------
diff --git a/qsw_mpi/MPI.py b/qsw_mpi/MPI.py
index 198857a..086121b 100644
--- a/qsw_mpi/MPI.py
+++ b/qsw_mpi/MPI.py
@@ -883,8 +883,8 @@ def __init__(
             self.H_loc_indices = H_loc.indices
             self.H_loc_data = H_loc.data
         else:
-            self.H_loc_indptr = np.zeros(H.shape[0] + 1, dtype = np.int)
-            self.H_loc_indices = np.zeros(1, dtype = np.int)
+            self.H_loc_indptr = np.zeros(H.shape[0] + 1, dtype = np.int64)
+            self.H_loc_indices = np.zeros(1, dtype = np.int64)
             self.H_loc_data = np.zeros(1, dtype = np.complex128)
 
         self.vsets = vsets
@@ -1015,9 +1015,9 @@ def save_vsets(self, filename, vsetsname, action = 'a'):
                 dset = f.create_dataset(
                         vsetsname + '/' + str(i),
                         (len(v),),
-                        dtype = np.int)
+                        dtype = np.int64)
 
-                dset[:] = np.array(v, dtype = np.int)
+                dset[:] = np.array(v, dtype = np.int64)
 
             f.close()
 
diff --git a/qsw_mpi/operators.py b/qsw_mpi/operators.py
index 56f1953..d6d9317 100644
--- a/qsw_mpi/operators.py
+++ b/qsw_mpi/operators.py
@@ -20,7 +20,7 @@
 import qsw_mpi.foperators as foperators
 import copy
 
-I = np.complex(0,1)
+I = 1j
 
 def check_indices(G):
     """
diff --git a/requirements.txt b/requirements.txt
index feb38fc..7aec65d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,7 @@
+""" run 
+sudo apt install make openmpi-bin gfortran openmpi-common openmpi-doc libopenmpi-dev mpich -y
+"""
+wheel
 numpy
 scipy
 mpi4py