diff --git a/openapi/SwarmDebug.yaml b/openapi/SwarmDebug.yaml
index 709b42b2c2c..e31f943469a 100644
--- a/openapi/SwarmDebug.yaml
+++ b/openapi/SwarmDebug.yaml
@@ -850,7 +850,7 @@ paths:
         - in: path
           name: amount
           schema:
-            type: integer
+            $ref: "SwarmCommon.yaml#/components/schemas/BigInt"
           required: true
           description: Amount of BZZ added that the postage batch will have.
         - in: path