diff --git a/tsfresh/feature_extraction/feature_calculators.py b/tsfresh/feature_extraction/feature_calculators.py
index 3df61b6ec..903102d5c 100644
--- a/tsfresh/feature_extraction/feature_calculators.py
+++ b/tsfresh/feature_extraction/feature_calculators.py
@@ -986,7 +986,7 @@ def get_moment(y, moment):
         :return: the moment requested
         :return type: float
         """
-        return y.dot(np.arange(len(y))**moment) / y.sum()
+        return y.dot(np.arange(len(y), dtype=float)**moment) / y.sum()
 
     def get_centroid(y):
         """