diff --git a/README.md b/README.md
index 07f12e8..dff781e 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,9 @@ Create a workflow `.yml` file in your repositories `.github/workflows` directory
 * `key` - An explicit key for restoring and saving the cache
 * `restore-keys` - An ordered list of keys to use for restoring the cache if no cache hit occurred for key
 
+### Environment Variables
+ * `CACHE_SKIP_SAVE` - [optional] When set to `true`, any modifications made to the restored cache will not be persisted back at the end of the step.  This environment variable can be set at any time using `echo "CACHE_SKIP_SAVE=true" >> $GITHUB_ENV`
+
 ### Outputs
 
 * `cache-hit` - A boolean value to indicate an exact match was found for the key