diff --git a/src/Phpml/Math/Distance/Minkowski.php b/src/Phpml/Math/Distance/Minkowski.php
index cb13a7c..6ed0660 100644
--- a/src/Phpml/Math/Distance/Minkowski.php
+++ b/src/Phpml/Math/Distance/Minkowski.php
@@ -43,6 +43,6 @@ class Minkowski implements Distance
             $distance += pow(abs($a[$i] - $b[$i]), $this->lambda);
         }
 
-        return pow($distance, 1 / $this->lambda);
+        return (float)pow($distance, 1 / $this->lambda);
     }
 }