diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8b111f45..6fef247d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ## Optimisations
 
 ## Bug Fixes
+- [#905](https://github.com/pybop-team/PyBOP/pull/905) - Remove restriction on numpy.
 
 ## Breaking Changes
 
diff --git a/pybop/plot/contour.py b/pybop/plot/contour.py
index dc3f301df..da2d6a1a6 100644
--- a/pybop/plot/contour.py
+++ b/pybop/plot/contour.py
@@ -119,7 +119,7 @@ def contour(
                 ).get_values()
                 costs[j, i], sensitivities = out[0][0], out[1]
                 for k, key in enumerate(problem.parameters.names):
-                    grads[k][j, i] = sensitivities[key]
+                    grads[k][j, i] = sensitivities[key].item()
             else:
                 costs[j, i] = problem.evaluate(
                     np.asarray([xi, yj] + additional_values),
diff --git a/pyproject.toml b/pyproject.toml
index 56870a2cb..29ab831e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,9 +29,9 @@ classifiers = [
 requires-python = ">=3.10, <3.14"
 dependencies = [
     "pybamm>=25.12.0",
-    "numpy>=1.26, <2.4.0",
+    "numpy>=1.26",
     "scipy>=1.12",
-    "pints>=0.5.1",
+    "pints>=0.6.0",
     "SALib>=1.5",
 ]