diff --git a/requirements.txt b/requirements.txt
index 53f20d67..7e594f91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ pytest-cov==6.0.0
 zarr==2.18.4
 ruff==0.8.6
 netcdf4==1.7.2
-h5netcdf==1.4.1
+h5netcdf==1.5.0
 impactlab-tools==0.6.0
 p_tqdm==1.4.2
 pyarrow==19.0.0