diff --git a/Cargo.lock b/Cargo.lock
index 9eba221..ffe02d4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -654,7 +654,7 @@ dependencies = [
 
 [[package]]
 name = "terraswap"
-version = "2.4.0"
+version = "2.4.1"
 dependencies = [
  "cosmwasm-schema",
  "cosmwasm-std",
diff --git a/contracts/terraswap_factory/Cargo.toml b/contracts/terraswap_factory/Cargo.toml
index f35344a..484c86b 100644
--- a/contracts/terraswap_factory/Cargo.toml
+++ b/contracts/terraswap_factory/Cargo.toml
@@ -34,7 +34,7 @@ overflow-checks = true
 backtraces = ["cosmwasm-std/backtraces"]
 
 [dependencies]
-terraswap = { path = "../../packages/terraswap", default-features = false, version = "2.4.0"}
+terraswap = { path = "../../packages/terraswap", default-features = false, version = "2.4.1"}
 cosmwasm-std = { version = "0.16.0" }
 cw-storage-plus = { version = "0.8.0" } 
 schemars = "0.8.1"
diff --git a/contracts/terraswap_pair/Cargo.toml b/contracts/terraswap_pair/Cargo.toml
index 120548c..11f0703 100644
--- a/contracts/terraswap_pair/Cargo.toml
+++ b/contracts/terraswap_pair/Cargo.toml
@@ -44,7 +44,7 @@ serde = { version = "1.0.103", default-features = false, features = ["derive"] }
 thiserror = { version = "1.0.20" }
 protobuf = { version = "2", features = ["with-bytes"] }
 cosmwasm-bignumber = "2.2.0"
-terraswap = { path = "../../packages/terraswap", default-features = false, version = "2.4.0"}
+terraswap = { path = "../../packages/terraswap", default-features = false, version = "2.4.1"}
 
 [dev-dependencies]
 cosmwasm-schema = "0.16.0"
diff --git a/contracts/terraswap_pair/src/contract.rs b/contracts/terraswap_pair/src/contract.rs
index 9a8fcd1..35909e4 100644
--- a/contracts/terraswap_pair/src/contract.rs
+++ b/contracts/terraswap_pair/src/contract.rs
@@ -269,14 +269,20 @@ pub fn provide_liquidity(
         )
     };
 
+    // prevent providing free token
+    if share.is_zero() {
+        return Err(ContractError::InvalidZeroAmount{});
+    }
+
     // mint LP token to sender
+    let receiver = receiver.unwrap_or_else(|| info.sender.to_string());
     messages.push(CosmosMsg::Wasm(WasmMsg::Execute {
         contract_addr: deps
             .api
             .addr_humanize(&pair_info.liquidity_token)?
             .to_string(),
         msg: to_binary(&Cw20ExecuteMsg::Mint {
-            recipient: receiver.unwrap_or_else(|| info.sender.to_string()),
+            recipient: receiver.to_string(),
             amount: share,
         })?,
         funds: vec![],
@@ -284,6 +290,8 @@ pub fn provide_liquidity(
 
     Ok(Response::new().add_messages(messages).add_attributes(vec![
         ("action", "provide_liquidity"),
+        ("sender", info.sender.as_str()),
+        ("receiver", receiver.as_str()),
         ("assets", &format!("{}, {}", assets[0], assets[1])),
         ("share", &share.to_string()),
     ]))
@@ -317,7 +325,9 @@ pub fn withdraw_liquidity(
             refund_assets[0]
                 .clone()
                 .into_msg(&deps.querier, sender.clone())?,
-            refund_assets[1].clone().into_msg(&deps.querier, sender)?,
+            refund_assets[1]
+                .clone()
+                .into_msg(&deps.querier, sender.clone())?,
             // burn liquidity token
             CosmosMsg::Wasm(WasmMsg::Execute {
                 contract_addr: deps
@@ -330,6 +340,7 @@ pub fn withdraw_liquidity(
         ])
         .add_attributes(vec![
             ("action", "withdraw_liquidity"),
+            ("sender", sender.as_str()),
             ("withdrawn_share", &amount.to_string()),
             (
                 "refund_assets",
@@ -397,13 +408,16 @@ pub fn swap(
     };
 
     let tax_amount = return_asset.compute_tax(&deps.querier)?;
+    let receiver = to.unwrap_or(sender.clone());
 
     // 1. send collateral token from the contract to a user
     // 2. send inactive commission to collector
     Ok(Response::new()
-        .add_message(return_asset.into_msg(&deps.querier, to.unwrap_or(sender))?)
+        .add_message(return_asset.into_msg(&deps.querier, receiver.clone())?)
         .add_attributes(vec![
             ("action", "swap"),
+            ("sender", sender.as_str()),
+            ("receiver", receiver.as_str()),
             ("offer_asset", &offer_asset.info.to_string()),
             ("ask_asset", &ask_pool.info.to_string()),
             ("offer_amount", &offer_amount.to_string()),
diff --git a/contracts/terraswap_router/Cargo.toml b/contracts/terraswap_router/Cargo.toml
index 95f2aab..b74565e 100644
--- a/contracts/terraswap_router/Cargo.toml
+++ b/contracts/terraswap_router/Cargo.toml
@@ -36,7 +36,7 @@ backtraces = ["cosmwasm-std/backtraces"]
 [dependencies]
 cw20 = { version = "0.8.0" } 
 cosmwasm-std = { version = "0.16.0" }
-terraswap = { path = "../../packages/terraswap", version = "2.4.0" }
+terraswap = { path = "../../packages/terraswap", version = "2.4.1" }
 terra-cosmwasm = "2.2.0"
 cw-storage-plus = { version = "0.8.0"}
 integer-sqrt = "0.1.5"
diff --git a/contracts/terraswap_token/Cargo.toml b/contracts/terraswap_token/Cargo.toml
index 17b679b..5144143 100644
--- a/contracts/terraswap_token/Cargo.toml
+++ b/contracts/terraswap_token/Cargo.toml
@@ -27,7 +27,7 @@ cosmwasm-std = { version = "0.16.0" }
 schemars = "0.8.1"
 serde = { version = "1.0.103", default-features = false, features = ["derive"] }
 thiserror = { version = "1.0.20" }
-terraswap = { path = "../../packages/terraswap", version = "2.4.0" }
+terraswap = { path = "../../packages/terraswap", version = "2.4.1" }
 
 [dev-dependencies]
 # we only need to enable this if we use integration tests
diff --git a/packages/terraswap/Cargo.toml b/packages/terraswap/Cargo.toml
index 1805588..907af90 100644
--- a/packages/terraswap/Cargo.toml
+++ b/packages/terraswap/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "terraswap"
-version = "2.4.0"
+version = "2.4.1"
 authors = ["Terraform Labs, PTE."]
 edition = "2018"
 description = "Common terraswap types"