diff --git a/orangecontrib/spectroscopy/__init__.py b/orangecontrib/spectroscopy/__init__.py
index 33b873f8d..91e69353b 100644
--- a/orangecontrib/spectroscopy/__init__.py
+++ b/orangecontrib/spectroscopy/__init__.py
@@ -22,3 +22,13 @@ def get_sample_datasets_dir():
 
 
 Orange.data.table.dataset_dirs.append(get_sample_datasets_dir())
+
+
+try:
+    import dask
+    import dask.distributed
+    dask_client = dask.distributed.Client(processes=False, n_workers=2,
+                                          dashboard_address=None)
+except ImportError:
+    dask = None
+    dask_client = None
\ No newline at end of file
diff --git a/orangecontrib/spectroscopy/widgets/owspectra.py b/orangecontrib/spectroscopy/widgets/owspectra.py
index 4558d0bc0..deaa05d43 100644
--- a/orangecontrib/spectroscopy/widgets/owspectra.py
+++ b/orangecontrib/spectroscopy/widgets/owspectra.py
@@ -9,9 +9,6 @@
 try:
     import dask
     import dask.array as da
-    import dask.distributed
-    dask_client = dask.distributed.Client(processes=False, n_workers=2,
-                                          threads_per_worker=4, dashboard_address=None)
 except ImportError:
     dask = None
 
@@ -46,6 +43,7 @@
 from Orange.widgets.visualize.utils.plotutils import HelpEventDelegate, PlotWidget
 from Orange.widgets.visualize.utils.customizableplot import CommonParameterSetter
 
+from orangecontrib.spectroscopy import dask_client
 from orangecontrib.spectroscopy.data import getx
 from orangecontrib.spectroscopy.utils import apply_columns_numpy
 from orangecontrib.spectroscopy.widgets.line_geometry import \