diff --git a/pyproject.toml b/pyproject.toml
index 977315d..d7d445b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ dynamic = [
 ]
 dependencies = [
   "asdf >= 3.1.0",
-  "zarr >= 2.14, < 3.0.0",
+  "zarr >= 2.14, < 4.0.0",
   "fsspec",
 ]