diff --git a/requirements.txt b/requirements.txt
index 5c050184..d3464ca1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ requests==2.32.3
 statsmodels==0.14.4
 pytest==8.3.4
 pytest-cov==6.0.0
-zarr==2.18.3
+zarr==2.18.4
 ruff==0.8.3
 netcdf4==1.7.2
 h5netcdf==1.4.1