diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..9f5872299c573dba2a058e6dfb0de52c7c41f5b7
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Earth Sciences
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/diagonals/moc.py b/diagonals/moc.py
index e8c3c95a7ebe745fea6e88b667a32218c4a2c7ad..211d62edaa9f8561ab86c03bb64773b293bde344 100644
--- a/diagonals/moc.py
+++ b/diagonals/moc.py
@@ -41,7 +41,7 @@ def compute(basins, e1v, e3v, vo):
     if diagonals.CONFIG.use_gpu:
         moc = _compute_moc_gpu(
             vo, area
-            )
+        )
     else:
         moc = _compute_moc_cpu(
             vo, area
@@ -180,7 +180,7 @@ def _vertical_cumsum(moc, out):
     moc: float32
         Masked array containing the moc index for a given basin.
     """
-    for lev in reversed(range(moc.shape[1]-1)):
+    for lev in range(moc.shape[1] - 2, -1, -1):
         moc[:, lev, :] = moc[:, lev, :] + moc[:, lev+1, :]
 
 
diff --git a/setup.py b/setup.py
index 7efa2532da67e42daf9a34e6228d60c50e8aef3c..e2bae3e835e23b02447adcba46105b725f7ed85b 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ REQUIREMENTS = {
 
 
 setup(name='diagonals',
-      version='0.2.0',
+      version='0.2.1',
       description='Compute diagnostics targeting the CPU or the GPU',
       url='https://earth.bsc.es/gitlab/es/diagonals',
       author='BSC-CNS Earth Sciences Department',