diff --git a/package.json b/package.json
index 5a3ef9b..f1b6af1 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     },
     "dependencies": {
         "@1inch/byte-utils": "2.2.0",
-        "@1inch/limit-order-sdk": "4.5.0",
+        "@1inch/limit-order-sdk": "4.6.1",
         "@metamask/eth-sig-util": "^5.0.2",
         "bn.js": "^5.2.1",
         "ethers": "6.11.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 5b990ba..a772b00 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -9,8 +9,8 @@ dependencies:
     specifier: 2.2.0
     version: 2.2.0
   '@1inch/limit-order-sdk':
-    specifier: 4.5.0
-    version: 4.5.0(assert@2.1.0)(axios@1.6.8)
+    specifier: 4.6.1
+    version: 4.6.1(assert@2.1.0)(axios@1.6.8)
   '@metamask/eth-sig-util':
     specifier: ^5.0.2
     version: 5.1.0
@@ -155,8 +155,8 @@ packages:
       typescript: 4.9.4
     dev: true
 
-  /@1inch/limit-order-sdk@4.5.0(assert@2.1.0)(axios@1.6.8):
-    resolution: {integrity: sha512-1wBGKc4ftcZdlLbjXudZVJ4o4x/svEugO8wcJdvAWhcCiQTADdwULVCHCSgsofIpVa0lu0sUPPBSg6rIdGKQ2A==}
+  /@1inch/limit-order-sdk@4.6.1(assert@2.1.0)(axios@1.6.8):
+    resolution: {integrity: sha512-1qgWxAhrmV3x5j+qH54fneS4iiCgV4f1thVvbObkMEQee1VRVnGmRHJRywZ4MYOM6+Wgo1Vape2b1lejx6zffg==}
     engines: {node: '>=18.16.0'}
     peerDependencies:
       assert: ^2.0.0
diff --git a/src/fusion-order/fusion-order.ts b/src/fusion-order/fusion-order.ts
index daafee7..eb1bf29 100644
--- a/src/fusion-order/fusion-order.ts
+++ b/src/fusion-order/fusion-order.ts
@@ -269,6 +269,8 @@ export class FusionOrder {
 
         const makerTraits = new MakerTraits(BigInt(order.makerTraits))
 
+        assert(!makerTraits.isPrivate(), 'fusion order can not be private')
+
         const auctionDetails = AuctionDetails.fromExtension(extension)
 
         const postInteractionData =