diff --git a/ci/environments/opendap/environment.yml b/ci/environments/opendap/environment.yml
index f46c553..fae282e 100644
--- a/ci/environments/opendap/environment.yml
+++ b/ci/environments/opendap/environment.yml
@@ -4,8 +4,6 @@ channels:
 dependencies:
   - python=3.10
   - xarray=2024.1.0
-  - certifi=2023.11.17
-  - cftime=1.6.3
   - dask
   - dask-gateway
   - graphviz
@@ -32,8 +30,6 @@ dependencies:
   - pqdm
   - s3fs
   - nbgitpuller
-  # https://github.com/jupyterlab/jupyter-collaboration/issues/202
-  # - jupyter-collaboration
   - pip
   - pip:
     - netcdf4==1.6.5
diff --git a/ci/environments/opendap/requirements.txt b/ci/environments/opendap/requirements.txt
new file mode 100644
index 0000000..12543e9
--- /dev/null
+++ b/ci/environments/opendap/requirements.txt
@@ -0,0 +1,3 @@
+netcdf4==1.6.5
+certifi==2023.11.17
+cftime==1.6.3