diff --git a/script/local.py b/script/local.py
index 05d0077..ce4f03f 100644
--- a/script/local.py
+++ b/script/local.py
@@ -27,4 +27,5 @@ def enforce_monotonic(array):
     for i in range(1,len(array)):
         if abs(array[i] - array[i-1])< 0.0001:
             array[i] = array[i-1] + 0.0000001
+    return array