diff --git a/requirements.txt b/requirements.txt
index 07dec6d3..23f9d546 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ requests==2.32.5
 statsmodels==0.14.6
 pytest==8.4.2
 pytest-cov==7.0.0
-zarr==2.18.4
+zarr==3.1.5
 ruff==0.8.6
 netcdf4==1.7.2
 h5netcdf==1.7.3