diff --git a/api/services/elastigroup/aws/emr/schemas/compute/compute.yaml b/api/services/elastigroup/aws/emr/schemas/compute/compute.yaml
index 6847454bf..3dfc5b77c 100644
--- a/api/services/elastigroup/aws/emr/schemas/compute/compute.yaml
+++ b/api/services/elastigroup/aws/emr/schemas/compute/compute.yaml
@@ -16,10 +16,9 @@ properties:
   steps:
       $ref: "./steps.yaml"
   instanceGroups:
-    type: array
-    description: Array of instance groups for this MR scaler
-    items:
-      $ref: "./instanceGroup.yaml"
+    type: object
+    description: Instance groups for this MR scaler
+    $ref: "./instanceGroup.yaml"
   instanceWeights:
     type: array
     description: An array of custom-weight settings