diff --git a/README.md b/README.md
index fe15cc5..7fd0670 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,10 @@ From the folder you downloaded this code open the terminal and run:
 **Debug (required)**
   * **Description:** Show verbose debug logs
   * **Example:** `true`
+  
+  **Parallelizable (optional)**
+    * **Description:** Allow each shard to run multiple simulators in parallel
+    * **Example:** `true`
 
 ## Outputs
 
diff --git a/step.yml b/step.yml
index db3d06e..bb7d51c 100644
--- a/step.yml
+++ b/step.yml
@@ -73,6 +73,10 @@ description: |-
   **Debug**
     * **Description:** Create verbose debug logs
     * **Example:** YES / NO
+    
+  **Parallelizable**
+    * **Description:** Allow shards to run tests with multiple simulators in parallel
+    * **Example:** YES / NO
 
   ## Outputs