From 4cd64849e578c84e019b45c1bf56db3278a3c3a4 Mon Sep 17 00:00:00 2001
From: szhan <shing.zhan@gmail.com>
Date: Fri, 15 May 2026 10:50:55 +0100
Subject: [PATCH] Specify read-only mode

---
 sc2ts/dataset.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sc2ts/dataset.py b/sc2ts/dataset.py
index d6f1c02c..26e62803 100644
--- a/sc2ts/dataset.py
+++ b/sc2ts/dataset.py
@@ -258,7 +258,7 @@ def __init__(self, path, chunk_cache_size=1, date_field=None):
         self.date_field = date_field
         self.path = pathlib.Path(path)
         if self.path.suffix == ".zip":
-            self.store = zarr.ZipStore(path)
+            self.store = zarr.ZipStore(path, mode="r")
         else:
             self.store = zarr.DirectoryStore(path)
         self.root = zarr.open(self.store, mode="r")