diff --git a/package.json b/package.json
index f389e1e..982de6b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.15.22-rc.0",
+  "version": "0.15.22-rc.1",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
diff --git a/src/services/OrionAggregator/ws/schemas/swapInfoSchema.ts b/src/services/OrionAggregator/ws/schemas/swapInfoSchema.ts
index ea29c29..b561592 100644
--- a/src/services/OrionAggregator/ws/schemas/swapInfoSchema.ts
+++ b/src/services/OrionAggregator/ws/schemas/swapInfoSchema.ts
@@ -25,11 +25,11 @@ const swapInfoSchemaBase = baseMessageSchema.extend({
   as: z.object({ // execution alternatives
     e: z.string().array(), // exchanges
     ps: z.string().array(), // path
-    mo: z.number().nullable(), // market amount out
-    mi: z.number().nullable(), // market amount in
+    mo: z.number().optional(), // market amount out
+    mi: z.number().optional(), // market amount in
     mp: z.number(), // market price
-    aa: z.number().nullable(), // available amount in
-    aao: z.number().nullable(), // available amount out
+    aa: z.number().optional(), // available amount in
+    aao: z.number().optional(), // available amount out
   }).array(),
 });