diff --git a/pyproject.toml b/pyproject.toml
index 03e15b4..cf40085 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,6 @@ test = [
     "scipy",
     "pandas",
     "h5py",
-    "zarr >=2.16.0"
     ]
 
 docs = [