diff --git a/virtualizarr/vendor/zarr/LICENSE.txt b/virtualizarr/vendor/zarr/LICENSE.txt
new file mode 100644
index 00000000..a4de1c39
--- /dev/null
+++ b/virtualizarr/vendor/zarr/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2024 Zarr Developers <https://github.com/zarr-developers>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/virtualizarr/vendor/zarr/__init__.py b/virtualizarr/vendor/zarr/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/virtualizarr/vendor/zarr/utils.py b/virtualizarr/vendor/zarr/utils.py
new file mode 100644
index 00000000..32986793
--- /dev/null
+++ b/virtualizarr/vendor/zarr/utils.py
@@ -0,0 +1,26 @@
+import json
+import numbers
+from typing import Any
+
+
+class NumberEncoder(json.JSONEncoder):
+    def default(self, o):
+        # See json.JSONEncoder.default docstring for explanation
+        # This is necessary to encode numpy dtype
+        if isinstance(o, numbers.Integral):
+            return int(o)
+        if isinstance(o, numbers.Real):
+            return float(o)
+        return json.JSONEncoder.default(self, o)
+
+
+def json_dumps(o: Any) -> bytes:
+    """Write JSON in a consistent, human-readable way."""
+    return json.dumps(
+        o,
+        indent=4,
+        sort_keys=True,
+        ensure_ascii=True,
+        separators=(",", ": "),
+        cls=NumberEncoder,
+    ).encode("ascii")
diff --git a/virtualizarr/zarr.py b/virtualizarr/zarr.py
index f2f15bcb..545a86fc 100644
--- a/virtualizarr/zarr.py
+++ b/virtualizarr/zarr.py
@@ -12,7 +12,8 @@
 import ujson  # type: ignore
 import xarray as xr
 from pydantic import BaseModel, ConfigDict, field_validator
-from zarr.v2.util import json_dumps
+
+from virtualizarr.vendor.zarr.utils import json_dumps
 
 if TYPE_CHECKING:
     pass