diff --git a/src/View/Results/Window.py b/src/View/Results/Window.py
index 53b85b31..f5e13429 100644
--- a/src/View/Results/Window.py
+++ b/src/View/Results/Window.py
@@ -33,6 +33,7 @@ except Exception as e:
 
 from functools import reduce
 
+import numpy as np
 from numpy import sqrt
 
 from datetime import datetime
@@ -915,13 +916,13 @@ class ResultsWindow(PamhyrWindow):
             if envelop:
                 my_dict[dict_y["min_discharge"]] = list(
                     map(
-                        lambda p: min(q[:, p.global_index]),
+                        lambda p: np.min(q[:, p.global_index]),
                         reach.profiles
                     )
                 )
                 my_dict[dict_y["max_discharge"]] = list(
                     map(
-                        lambda p: max(q[:, p.global_index]),
+                        lambda p: np.max(q[:, p.global_index]),
                         reach.profiles
                     )
                 )
@@ -935,13 +936,13 @@ class ResultsWindow(PamhyrWindow):
             if envelop:
                 my_dict[dict_y["min_water_elevation"]] = list(
                     map(
-                        lambda p: min(z[:, p.global_index]),
+                        lambda p: np.min(z[:, p.global_index]),
                         reach.profiles
                     )
                 )
                 my_dict[dict_y["max_water_elevation"]] = list(
                     map(
-                        lambda p: max(z[:, p.global_index]),
+                        lambda p: np.max(z[:, p.global_index]),
                         reach.profiles
                     )
                 )
@@ -998,14 +999,14 @@ class ResultsWindow(PamhyrWindow):
             if envelop:
                 my_dict[dict_y["min_depth"]] = list(map(
                     lambda p1, p2: p1 - p2, map(
-                            lambda p: min(z[:, p.global_index]),
+                            lambda p: np.min(z[:, p.global_index]),
                             reach.profiles
                         ), reach.geometry.get_z_min()
                     )
                 )
                 my_dict[dict_y["max_depth"]] = list(map(
                     lambda p1, p2: p1 - p2, map(
-                            lambda p: max(z[:, p.global_index]),
+                            lambda p: np.max(z[:, p.global_index]),
                             reach.profiles
                         ), reach.geometry.get_z_min()
                     )