diff --git a/.github/workflows/ci-oldest-reqs.txt b/.github/workflows/ci-oldest-reqs.txt
index 5032aa5..a2a2dd6 100644
--- a/.github/workflows/ci-oldest-reqs.txt
+++ b/.github/workflows/ci-oldest-reqs.txt
@@ -1,5 +1,5 @@
 coverage==5.3.1
-numpy==1.19.0
+numpy==1.21.0
 pymongo==3.10.0
 pytest==6.2.1
 pytest-cov==2.10.1
diff --git a/changelog.txt b/changelog.txt
index 314d335..f4c0284 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -4,6 +4,13 @@ Changelog
 
 The **synced_collections** package follows `semantic versioning <https://semver.org/>`_.
 
+[1.0.1] -- 2024-xx-xx
+---------------------
+
+Fixed
++++++
+
+- Tests run with numpy 2.0.
 
 [1.0.0] -- 2023-05-17
 =====================
diff --git a/contributors.yaml b/contributors.yaml
index 4011bac..de3eda0 100644
--- a/contributors.yaml
+++ b/contributors.yaml
@@ -42,4 +42,9 @@ contributors:
     family-names: Mahapatra
     given-names: Onkar
     affiliation: "Cluster Innovation Centre, New Delhi"
+  -
+    family-names: Kerr
+    given-names: "Corwin B."
+    affiliation: "University of Michigan"
+    orcid: "https://orcid.org/0000-0003-0776-2596"
 ...
diff --git a/requirements/requirements-test-optional.txt b/requirements/requirements-test-optional.txt
index c6dbb07..ec670aa 100644
--- a/requirements/requirements-test-optional.txt
+++ b/requirements/requirements-test-optional.txt
@@ -1,4 +1,4 @@
-numpy==1.26.4
+numpy==2.0.0
 pymongo==4.6.3; implementation_name=='cpython'
 redis==5.0.3
 zarr==2.17.1; platform_system!='Windows'
diff --git a/tests/synced_collection_test.py b/tests/synced_collection_test.py
index c64efd5..e088e3c 100644
--- a/tests/synced_collection_test.py
+++ b/tests/synced_collection_test.py
@@ -53,7 +53,6 @@
         numpy.longdouble,
         numpy.float32,
         numpy.float64,
-        numpy.float_,
     )
 
     NUMPY_COMPLEX_TYPES: Tuple[Type, ...] = (
@@ -62,7 +61,6 @@
         numpy.clongdouble,
         numpy.complex64,
         numpy.complex128,
-        numpy.complex_,
     )
     NUMPY_SHAPES: Tuple[Any, ...] = (None, (1,), (2,), (2, 2))
 
diff --git a/tests/test_validators.py b/tests/test_validators.py
index 9cb1040..2600eb7 100644
--- a/tests/test_validators.py
+++ b/tests/test_validators.py
@@ -79,12 +79,12 @@ def test_dict_data(self, testdata):
     def test_numpy_data(self):
         data = numpy.random.rand(3, 4)
         json_format_validator(data)
-        json_format_validator(numpy.float_(3.14))
+        json_format_validator(numpy.float64(3.14))
         # numpy data as dict value
         json_format_validator({"test": data})
-        json_format_validator({"test": numpy.float_(1.0)})
+        json_format_validator({"test": numpy.float64(1.0)})
         # numpy data in list
-        json_format_validator([data, numpy.float_(1.0), 1, "test"])
+        json_format_validator([data, numpy.float64(1.0), 1, "test"])
 
     def test_invalid_data(self):
         class A: