diff --git a/CHANGELOG.md b/CHANGELOG.md
index b04c78d..71f2d9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.5.1
+
+- Skip building js assets if they already exist: [#81](https://github.com/jupyter-server/jupyter-resource-usage/pull/81)
+
 ## 0.5.0
 
 The repository has now moved to the [`jupyter-server`](https://github.com/jupyter-server) organization on GitHub.
diff --git a/RELEASE.md b/RELEASE.md
index 8af0f8b..995759f 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -5,8 +5,11 @@
 Creating a new environment can help avoid pushing local changes and any extra tag.
 
 ```bash
-conda create -n jupyter-resource-usage-release -c conda-forge twine keyring
+conda create -n jupyter-resource-usage-release -c conda-forge twine keyring jupyter-packaging python
 conda activate jupyter-resource-usage-release
+
+# install JupyterLab to build the extension
+python -m pip install --pre jupyterlab
 ```
 
 Alternatively, the local repository can be cleaned with: