diff --git a/pyproject.toml b/pyproject.toml
index c059671..34bfdf3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ authors = [
 readme = "README.md"
 requires-python = ">=3.8"
 dependencies = [
-    "zarr>=2.16.1",
+    "zarr>=2.16.1,<3",
     "h5py>=3.10.0",
     "requests>=2.31.0",
     "tqdm>=4.66.4",