diff --git a/ci/environment-py38.yml b/ci/environment-py38.yml
index 050ad57d..e0334a88 100644
--- a/ci/environment-py38.yml
+++ b/ci/environment-py38.yml
@@ -8,6 +8,7 @@ dependencies:
   - zarr
   - xarray
   - h5netcdf
+  - h5py<3.9
   - pandas
   - cfgrib
   - cftime
@@ -22,7 +23,7 @@ dependencies:
   - python-blosc
   - flake8
   - fastparquet
-  - pyopenssl=23.1.1
+  - pyopenssl
   - black
   - pip
   - tifffile
diff --git a/ci/environment-py39.yml b/ci/environment-py39.yml
index f4f4e4c4..ef0f41f1 100644
--- a/ci/environment-py39.yml
+++ b/ci/environment-py39.yml
@@ -8,6 +8,7 @@ dependencies:
   - zarr
   - xarray
   - h5netcdf
+  - h5py<3.9
   - pandas
   - cfgrib
   - cftime
@@ -22,7 +23,7 @@ dependencies:
   - python-blosc
   - flake8
   - fastparquet
-  - pyopenssl=23.1.1
+  - pyopenssl
   - black
   - pip
   - tifffile