diff --git a/repo2docker/buildpacks/conda/environment.yml b/repo2docker/buildpacks/conda/environment.yml
index 538bdbbf..8f844145 100644
--- a/repo2docker/buildpacks/conda/environment.yml
+++ b/repo2docker/buildpacks/conda/environment.yml
@@ -4,9 +4,9 @@ dependencies:
   - python=3.10
   - nodejs=18
   - pip
-  - ipywidgets==8.0.2
-  - jupyter-offlinenotebook==0.2.2
-  - jupyter-resource-usage==0.7.0
-  - jupyterlab==3.4.8
-  - jupyterhub-singleuser==3.1.1
-  - notebook==6.4.12
+  - ipywidgets==8.*   # https://github.com/jupyter-widgets/ipywidgets
+  - jupyter-offlinenotebook==0.2.*   # https://github.com/manics/jupyter-offlinenotebook
+  - jupyter-resource-usage==0.7.*   # https://github.com/jupyter-server/jupyter-resource-usage
+  - jupyterlab==3.*   # https://github.com/jupyterlab/jupyterlab
+  - jupyterhub-singleuser==3.*   # https://github.com/jupyterhub/jupyterhub
+  - notebook==6.*   # https://github.com/jupyter/notebook