diff --git a/pyproject.toml b/pyproject.toml
index db7a00a..23b72de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ dependencies = [
     "pandas>=2.0",
     "pynwb",
     "rich>=13.5.2",
-    "zarr>=2.16.1",
+    "zarr<2.18.1",
     "matplotlib>=3.7.2",
     "scipy>=1.9.3",
     "DynamicRoutingTask>=0.1.94",