diff --git a/api/services/ocean/gke/schemas/ocean-strategy.yaml b/api/services/ocean/gke/schemas/ocean-strategy.yaml
index 24fd8211..0412b68a 100644
--- a/api/services/ocean/gke/schemas/ocean-strategy.yaml
+++ b/api/services/ocean/gke/schemas/ocean-strategy.yaml
@@ -25,4 +25,22 @@ properties:
     type: boolean
     example: true
     description: >
-      Enable committed use discounts utilization.
\ No newline at end of file
+      Enable committed use discounts utilization.
+  revertToPreferred:
+    type: object
+    description: >
+      Allow the replacement of instances to Preferred ones if available.
+    properties:
+      shouldPerform:
+        type: boolean
+        default: true
+        description: >
+          If enabled, replacements will be performed for all of your cluster, unless configured on VNG level. TRUE is the default
+      maxBatchPercentage:
+        type: integer
+        minimum: 0
+        maximum: 100
+        default: 10
+        description: >
+          Decide on the % of instances that will be replaced at once
+          
diff --git a/api/services/ocean/gke/schemas/oceanLaunchSpecStrategy.yaml b/api/services/ocean/gke/schemas/oceanLaunchSpecStrategy.yaml
index 3db81226..87fb5585 100644
--- a/api/services/ocean/gke/schemas/oceanLaunchSpecStrategy.yaml
+++ b/api/services/ocean/gke/schemas/oceanLaunchSpecStrategy.yaml
@@ -17,3 +17,20 @@ properties:
     example: true
     description: >
       Enable committed use discounts utilization.
+  revertToPreferred:
+    type: object
+    description: >
+      Allow the replacement of instances to Preferred ones if available.
+    properties:
+      shouldPerform:
+        type: boolean
+        default: true
+        description: >
+          If enabled, replacements will be performed for your VNG. TRUE is the default
+      maxBatchPercentage:
+        type: integer
+        minimum: 0
+        maximum: 100
+        default: 10
+        description: >
+          Decide on the % of instances that will be replaced at once