diff --git a/setup.py b/setup.py
index 569796b..3dac91b 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 
 HERE = pathlib.Path(__file__).parent
 
-VERSION = '0.1.3'
+VERSION = '0.1.4'
 PACKAGE_NAME = 'tsmoothie'
 AUTHOR = 'Marco Cerliani'
 AUTHOR_EMAIL = 'cerlymarco@gmail.com'
diff --git a/tsmoothie/smoother.py b/tsmoothie/smoother.py
index 725c95e..284810e 100644
--- a/tsmoothie/smoother.py
+++ b/tsmoothie/smoother.py
@@ -1625,6 +1625,7 @@ def smooth(self, data):
         if 'tsmoothie.smoother' not in self.Smoother.__name__:
             raise ValueError("Use a Smoother from tsmoothie.smoother")
 
+        data = np.asarray(data)
         if np.prod(data.shape) == np.max(data.shape):
             data = data.ravel()[:,None]
         else: