diff --git a/Cargo.toml b/Cargo.toml
index c45ce52..6b6f98c 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "0.6.5"
+version = "0.6.6"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",
diff --git a/README.md b/README.md
index 49eb5dd..d723a96 100644
--- a/README.md
+++ b/README.md
@@ -89,14 +89,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.6" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "0.6.5"
+sol-trade-sdk = "0.6.6"
 ```
 
 ## 🛠️ Usage Examples
diff --git a/README_CN.md b/README_CN.md
index 8517ace..99b0433 100755
--- a/README_CN.md
+++ b/README_CN.md
@@ -89,14 +89,14 @@ git clone https://github.com/0xfnzero/sol-trade-sdk
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.6" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "0.6.5"
+sol-trade-sdk = "0.6.6"
 ```
 
 ## 🛠️ 使用示例
diff --git a/src/trading/common/transaction_builder.rs b/src/trading/common/transaction_builder.rs
index dfbaa5d..a39cc55 100755
--- a/src/trading/common/transaction_builder.rs
+++ b/src/trading/common/transaction_builder.rs
@@ -54,7 +54,7 @@ pub async fn build_transaction(
     instructions.extend(business_instructions);
 
     // Add tip transfer instruction
-    if with_tip {
+    if with_tip && tip_amount > 0.0 {
         instructions.push(transfer(
             &payer.pubkey(),
             tip_account,
diff --git a/src/trading/core/parallel.rs b/src/trading/core/parallel.rs
index 07b10b0..a023c5e 100755
--- a/src/trading/core/parallel.rs
+++ b/src/trading/core/parallel.rs
@@ -110,7 +110,7 @@ async fn parallel_execute(
 
             let tip_account_str = swqos_client.get_tip_account()?;
             let tip_account = Arc::new(Pubkey::from_str(&tip_account_str).unwrap_or_default());
-            let tip_amount = priority_fee.buy_tip_fees[i];
+            let tip_amount = if with_tip { priority_fee.buy_tip_fees[i] } else { 0.0 };
 
             let transaction = build_transaction(
                 payer,