diff --git a/README.md b/README.md
index da7754e5..96b3dcf0 100644
--- a/README.md
+++ b/README.md
@@ -64,10 +64,10 @@ To check the status of the cache, run
 jcache cache list -p _build/.jupyter_cache
 ```
 
-To clear the cache, run
+To remove cached notebooks, run
 
 ```
-jcache cache clear -p _build/.jupyter_cache
+jcache cache remove -p _build/.jupyter_cache
 ```
 
 ## Contributing
diff --git a/environment.yaml b/environment.yaml
index a2d9325f..420c6ff6 100644
--- a/environment.yaml
+++ b/environment.yaml
@@ -15,3 +15,4 @@ dependencies:
   - jupyterlab
   - pre-commit
   - ffmpeg
+  - tabulate