diff --git a/py_tools_ds/io/raster/writer.py b/py_tools_ds/io/raster/writer.py
index 0926361f4893f4f08d23462ca510e9e43bb96c30..02f611b98e23e527504b78540c0d57042a9b1cec 100644
--- a/py_tools_ds/io/raster/writer.py
+++ b/py_tools_ds/io/raster/writer.py
@@ -23,7 +23,6 @@
 
 import os
 import multiprocessing
-from spectral.io import envi
 
 try:
     import gdal
@@ -54,6 +53,8 @@ def write_numpy_to_image(array, path_out, outFmt='GTIFF', gt=None, prj=None):
 
 
 def write_envi(arr, outpath, gt=None, prj=None):
+    from spectral.io import envi
+
     if gt or prj:
         assert gt and prj, 'gt and prj must be provided together or left out.'
 
@@ -69,6 +70,8 @@ shared_array_on_disk__memmap = None
 
 
 def init_SharedArray_on_disk(out_path, dims, gt=None, prj=None):
+    from spectral.io import envi
+
     global shared_array_on_disk__memmap
     global shared_array_on_disk__path
     path = out_path if not os.path.splitext(out_path)[1] == '.bsq' else \
diff --git a/py_tools_ds/version.py b/py_tools_ds/version.py
index 94b5920066db2a4e6e3817b3f8778887f8ce8eb6..e259c400d1bd3fd436eed00f19e5e7cd69c5e954 100644
--- a/py_tools_ds/version.py
+++ b/py_tools_ds/version.py
@@ -19,5 +19,5 @@
 # You should have received a copy of the GNU Lesser General Public License along
 # with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-__version__ = '0.14.19'
-__versionalias__ = '20190722_01'
+__version__ = '0.14.20'
+__versionalias__ = '20190726_01'