diff --git a/CADETProcess/comparison/difference.py b/CADETProcess/comparison/difference.py
index 0a4089a13..3917585e4 100644
--- a/CADETProcess/comparison/difference.py
+++ b/CADETProcess/comparison/difference.py
@@ -4,7 +4,7 @@
 from warnings import warn
 
 import numpy as np
-from scipy.integrate import simps
+from scipy.integrate import simpson
 from scipy.special import expit
 
 from CADETProcess import CADETProcessError
@@ -427,10 +427,10 @@ def _evaluate(self, solution):
             Concentration profile of simulation.
 
         """
-        area_ref = simps(
+        area_ref = simpson(
             self.reference.solution, self.reference.time, axis=0
         )
-        area_new = simps(solution.solution, solution.time, axis=0)
+        area_new = simpson(solution.solution, solution.time, axis=0)
 
         return abs(area_ref - area_new)/area_ref
 
diff --git a/CADETProcess/dataStructure/parameter.py b/CADETProcess/dataStructure/parameter.py
index beb626979..b5b5d4cb4 100644
--- a/CADETProcess/dataStructure/parameter.py
+++ b/CADETProcess/dataStructure/parameter.py
@@ -1529,7 +1529,7 @@ def fill_values(self, dims, value):
             raise ValueError("Can only set single entry if n_entries == 1.")
 
         if isinstance(value, np.ndarray) and value.size == 1:
-            value = float(value)
+            value = float(value.squeeze())
 
         if isinstance(value, (int, float)):
             value = n_entries * [value]