diff --git a/bitstamphttp.go b/bitstamphttp.go
index 29135b22..36900be7 100644
--- a/bitstamphttp.go
+++ b/bitstamphttp.go
@@ -4,7 +4,6 @@ import (
 	"net/http"
 	"net/url"
 	"io/ioutil"
-	"fmt"
 	"log"
 	"encoding/hex"
 	"encoding/json"
@@ -117,7 +116,7 @@ func (b *Bitstamp) GetTicker() (BitstampTicker) {
 	err := SendHTTPRequest(BITSTAMP_API_URL + BITSTAMP_API_TICKER, true, &b.Ticker)
 
 	if err != nil {
-		fmt.Println(err) 
+		log.Println(err) 
 		return BitstampTicker{}
 	}
 
@@ -128,7 +127,7 @@ func (b *Bitstamp) GetOrderbook() {
 	err := SendHTTPRequest(BITSTAMP_API_URL + BITSTAMP_API_ORDERBOOK, true, &b.Orderbook)
 
 	if err != nil {
-		fmt.Println(err) 
+		log.Println(err) 
 		return
 	}
 }
@@ -137,7 +136,7 @@ func (b *Bitstamp) GetTransactions() {
 	err := SendHTTPRequest(BITSTAMP_API_URL + BITSTAMP_API_TRANSACTIONS, true, &b.Transactions)
 
 	if err != nil {
-		fmt.Println(err) 
+		log.Println(err) 
 		return
 	}
 }
@@ -146,7 +145,7 @@ func (b *Bitstamp) GetEURUSDConversionRate() {
 	err := SendHTTPRequest(BITSTAMP_API_URL + BITSTAMP_API_EURUSD, true, &b.ConversionRate)
 
 	if err != nil {
-		fmt.Println(err) 
+		log.Println(err) 
 		return
 	}
 }
@@ -155,7 +154,7 @@ func (b *Bitstamp) GetBalance() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_BALANCE, url.Values{}, &b.Balance)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -169,7 +168,7 @@ func (b *Bitstamp) GetUserTransactions(offset, limit, sort int64) {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_USER_TRANSACTIONS, req, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -180,7 +179,7 @@ func (b *Bitstamp) CancelOrder(OrderID int64) {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_CANCEL_ORDER, req, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -188,7 +187,7 @@ func (b *Bitstamp) GetOpenOrders() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_OPEN_ORDERS, url.Values{}, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -207,7 +206,7 @@ func (b *Bitstamp) PlaceOrder(price float64, amount float64, Type int) {
 	err := b.SendAuthenticatedHTTPRequest(orderType, req, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -215,7 +214,7 @@ func (b *Bitstamp) GetWithdrawalRequests() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_WITHDRAWAL_REQUESTS, url.Values{}, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -227,7 +226,7 @@ func (b *Bitstamp) BitcoinWithdrawal(amount float64, address string) {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_BITCOIN_WITHDRAWAL, req, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -235,7 +234,7 @@ func (b *Bitstamp) BitcoinDepositAddress() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_BITCOIN_DEPOSIT, url.Values{}, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -243,7 +242,7 @@ func (b *Bitstamp) UnconfirmedBitcoin() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_UNCONFIRMED_BITCOIN, url.Values{}, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -256,7 +255,7 @@ func (b *Bitstamp) RippleWithdrawal(amount float64, address, currency string) {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_RIPPLE_WITHDRAWAL, req, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -264,7 +263,7 @@ func (b *Bitstamp) RippleDepositAddress() {
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_RIPPLE_DESPOIT, url.Values{}, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -280,7 +279,7 @@ func (b *Bitstamp) SendAuthenticatedHTTPRequest(path string, values url.Values,
 	path = BITSTAMP_API_URL + path
 
 	if b.Verbose {
-		fmt.Println("Sending POST request to " + path)
+		log.Println("Sending POST request to " + path)
 	}
 
 	req, err := http.NewRequest("POST", path, reqBody)
@@ -300,7 +299,7 @@ func (b *Bitstamp) SendAuthenticatedHTTPRequest(path string, values url.Values,
 	contents, _ := ioutil.ReadAll(resp.Body)
 
 	if b.Verbose {
-		fmt.Printf("Recieved raw: %s\n", string(contents))
+		log.Printf("Recieved raw: %s\n", string(contents))
 	}
 
 	err = json.Unmarshal(contents, &result)
diff --git a/btcchinahttp.go b/btcchinahttp.go
index 0045dc9e..2b2fb19b 100644
--- a/btcchinahttp.go
+++ b/btcchinahttp.go
@@ -79,7 +79,7 @@ func (b *BTCChina) GetTicker(symbol string) (BTCChinaTicker) {
 	req := fmt.Sprintf("%sdata/ticker?market=%s", BTCCHINA_API_URL, symbol)
 	err := SendHTTPRequest(req, true, &resp)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return BTCChinaTicker{}
 	}
 	return resp.Ticker
@@ -89,7 +89,7 @@ func (b *BTCChina) GetTradesLast24h(symbol string) (bool) {
 	req := fmt.Sprintf("%sdata/trades?market=%s", BTCCHINA_API_URL, symbol)
 	err := SendHTTPRequest(req, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -116,7 +116,7 @@ func (b *BTCChina) GetTradeHistory(symbol string, limit, sinceTid int64, time ti
 
 	err := SendHTTPRequest(req, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -126,7 +126,7 @@ func (b *BTCChina) GetOrderBook(symbol string, limit int) (bool) {
 	req := fmt.Sprintf("%sdata/orderbook?market=%s&limit=%d", BTCCHINA_API_URL, symbol, limit)
 	err := SendHTTPRequest(req, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -136,7 +136,7 @@ func (b *BTCChina) GetAccountInfo() {
 	err := b.SendAuthenticatedHTTPRequest("getAccountInfo", nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -150,7 +150,7 @@ func (b *BTCChina) BuyOrder(price, amount float64) {
 	err := b.SendAuthenticatedHTTPRequest("buyOrder2", nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
diff --git a/btcehttp.go b/btcehttp.go
index cec0c50d..1dc54038 100644
--- a/btcehttp.go
+++ b/btcehttp.go
@@ -12,6 +12,7 @@ import (
 	"time"
 	"io/ioutil"
 	"fmt"
+	"log"
 )
 
 const (
@@ -82,7 +83,7 @@ func (b *BTCE) GetTicker(symbol string) (BTCeTicker) {
 	req := fmt.Sprintf("https://btc-e.com/api/2/%s/ticker", symbol)
 	err := SendHTTPRequest(req, true, &response)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return BTCeTicker{}
 	}
 	return response.Ticker
@@ -92,7 +93,7 @@ func (b *BTCE) GetInfo() {
 	err := b.SendAuthenticatedHTTPRequest(BTCE_GET_INFO, url.Values{})
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -103,7 +104,7 @@ func (b *BTCE) GetActiveOrders(pair string) {
 	err := b.SendAuthenticatedHTTPRequest(BTCE_ACTIVE_ORDERS, req)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -114,7 +115,7 @@ func (b *BTCE) CancelOrder(OrderID int64) {
 	err := b.SendAuthenticatedHTTPRequest(BTCE_CANCEL_ORDER, req)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -128,7 +129,7 @@ func (b *BTCE) Trade(pair, orderType string, amount, price float64) {
 	err := b.SendAuthenticatedHTTPRequest(BTCE_TRADE, req)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -145,7 +146,7 @@ func (b *BTCE) GetTransactionHistory(TIDFrom, Count, TIDEnd int64, order, since,
 	err := b.SendAuthenticatedHTTPRequest(BTCE_TRANSACTION_HISTORY, req)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -164,7 +165,7 @@ func (b *BTCE) GetTradeHistory(TIDFrom, Count, TIDEnd int64, order, since, end,
 	err := b.SendAuthenticatedHTTPRequest(BTCE_TRANSACTION_HISTORY, req)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -178,7 +179,7 @@ func (b *BTCE) SendAuthenticatedHTTPRequest(method string, values url.Values) (e
 	hmac.Write([]byte(encoded))
 
 	if b.Verbose {
-		fmt.Printf("Sending POST request to %s calling method %s with params %s\n", BTCE_API_URL, method, encoded)
+		log.Printf("Sending POST request to %s calling method %s with params %s\n", BTCE_API_URL, method, encoded)
 	}
 
 	reqBody := strings.NewReader(encoded)
@@ -202,7 +203,7 @@ func (b *BTCE) SendAuthenticatedHTTPRequest(method string, values url.Values) (e
 	contents, _ := ioutil.ReadAll(resp.Body)
 
 	if b.Verbose {
-		fmt.Printf("Recieved raw: %s\n", string(contents))
+		log.Printf("Recieved raw: %s\n", string(contents))
 	}
 	
 	resp.Body.Close()
diff --git a/btcmarkets.go b/btcmarkets.go
index 3fc836b5..e8fb508c 100644
--- a/btcmarkets.go
+++ b/btcmarkets.go
@@ -68,7 +68,7 @@ func (b *BTCMarkets) GetTicker(symbol string) (BTCMarketsTicker) {
 	path := fmt.Sprintf("/market/%s/AUD/tick", symbol)
 	err := SendHTTPRequest(BTCMARKETS_API_URL + path, true, &ticker)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return BTCMarketsTicker{}
 	}
 	return ticker
@@ -78,7 +78,7 @@ func (b *BTCMarkets) GetOrderbook(symbol string) {
 	path := fmt.Sprintf("/market/%s/AUD/orderbook", symbol)
 	err := SendHTTPRequest(BTCMARKETS_API_URL + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -91,7 +91,7 @@ func (b *BTCMarkets) GetTrades(symbol, since string) {
 	}
 	err := SendHTTPRequest(BTCMARKETS_API_URL + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
diff --git a/common.go b/common.go
index 02cb892a..07ae01e4 100644
--- a/common.go
+++ b/common.go
@@ -2,11 +2,11 @@ package main
 
 import (
 	"net/http"
-	"fmt"
 	"encoding/json"
 	"io/ioutil"
 	"errors"
 	"math"
+	"log"
 )
 
 func roundFloat(x float64, prec int) float64 {
@@ -49,17 +49,17 @@ func SendHTTPRequest(url string, jsonDecode bool, result interface{}) (err error
 	res, err := http.Get(url)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return err
 	}
 
 	if res.StatusCode != 200 {
-		fmt.Printf("HTTP status code: %d", res.StatusCode)
+		log.Printf("HTTP status code: %d", res.StatusCode)
 		return errors.New("Status code was not 200.")
 	}
 
 	contents, _ := ioutil.ReadAll(res.Body)
-	//fmt.Printf("Recieved raw: %s\n", string(contents))
+	//log.Printf("Recieved raw: %s\n", string(contents))
 
 	if jsonDecode {
 		err := json.Unmarshal(contents, &result)
diff --git a/huobihttp.go b/huobihttp.go
index 292f6e1b..ab66dffe 100644
--- a/huobihttp.go
+++ b/huobihttp.go
@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"time"
 	"fmt"
+	"log"
 )
 
 const (
@@ -73,7 +74,7 @@ func (h *HUOBI) GetTicker(symbol string) (HuobiTicker) {
 	err := SendHTTPRequest(path, true, &resp)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return HuobiTicker{}
 	}
 	return resp.Ticker
@@ -83,7 +84,7 @@ func (h *HUOBI) GetOrderBook(symbol string) (bool) {
 	path := fmt.Sprintf("http://market.huobi.com/staticmarket/depth_%s_json.js", symbol)
 	err := SendHTTPRequest(path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -93,7 +94,7 @@ func (h *HUOBI) GetAccountInfo() {
 	err := h.SendAuthenticatedRequest("get_account_info", url.Values{})
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -104,7 +105,7 @@ func (h *HUOBI) GetOrders(coinType int) {
 	err := h.SendAuthenticatedRequest("get_orders", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -115,7 +116,7 @@ func (h *HUOBI) GetOrderInfo(orderID, coinType int) {
 	err := h.SendAuthenticatedRequest("order_info", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -130,7 +131,7 @@ func (h *HUOBI) Trade(orderType string, coinType int, price, amount float64) {
 	err := h.SendAuthenticatedRequest(orderType, values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -145,7 +146,7 @@ func (h *HUOBI) MarketTrade(orderType string, coinType int, price, amount float6
 	err := h.SendAuthenticatedRequest(orderType, values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -156,7 +157,7 @@ func (h *HUOBI) CancelOrder(orderID, coinType int) {
 	err := h.SendAuthenticatedRequest("cancel_order", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -169,7 +170,7 @@ func (h *HUOBI) ModifyOrder(orderType string, coinType, orderID int, price, amou
 	err := h.SendAuthenticatedRequest("modify_order", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -179,7 +180,7 @@ func (h *HUOBI) GetNewDealOrders(coinType int) {
 	err := h.SendAuthenticatedRequest("get_new_deal_orders", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -190,7 +191,7 @@ func (h *HUOBI) GetOrderIDByTradeID(coinType, orderID int) {
 	err := h.SendAuthenticatedRequest("get_order_id_by_trade_id", values)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -206,8 +207,8 @@ func (h *HUOBI) SendAuthenticatedRequest(method string, v url.Values) (error) {
 	encoded := v.Encode()
 
 	if h.Verbose {
-		fmt.Printf("Signature: %s\n", signature)
-		fmt.Printf("Sending POST request to %s with params %s\n", HUOBI_API_URL, encoded)
+		log.Printf("Signature: %s\n", signature)
+		log.Printf("Sending POST request to %s with params %s\n", HUOBI_API_URL, encoded)
 	}
 
 	reqBody := strings.NewReader(encoded)
@@ -229,7 +230,7 @@ func (h *HUOBI) SendAuthenticatedRequest(method string, v url.Values) (error) {
 	contents, _ := ioutil.ReadAll(resp.Body)
 
 	if h.Verbose {
-		fmt.Printf("Recieved raw: %s\n", string(contents))
+		log.Printf("Recieved raw: %s\n", string(contents))
 	}
 
 	resp.Body.Close()
diff --git a/itbithttp.go b/itbithttp.go
index ea42b3e8..0dced0ec 100644
--- a/itbithttp.go
+++ b/itbithttp.go
@@ -13,7 +13,6 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"log"
-	"fmt"
 )
 
 const (
@@ -86,7 +85,7 @@ func (i *ItBit) GetTicker(currency string) (ItBitTicker) {
 	var itbitTicker ItBitTicker
 	err := SendHTTPRequest(path, true, &itbitTicker)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return ItBitTicker{}
 	}
 	return itbitTicker
@@ -96,7 +95,7 @@ func (i *ItBit) GetOrderbook(currency string) (bool) {
 	path := ITBIT_API_URL + "/markets/" + currency + "/orders"
 	err := SendHTTPRequest(path , true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -106,7 +105,7 @@ func (i *ItBit) GetTradeHistory(currency, timestamp string) (bool) {
 	req := "/trades?since=" + timestamp
 	err := SendHTTPRequest(ITBIT_API_URL + "markets/" + currency + req, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -122,7 +121,7 @@ func (i *ItBit) GetWallets(page int64, perPage int64, userID string) {
 	err := i.SendAuthenticatedHTTPRequest("GET", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -131,7 +130,7 @@ func (i *ItBit) GetWallet(walletID string) {
 	err := i.SendAuthenticatedHTTPRequest("GET", path, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -140,7 +139,7 @@ func (i *ItBit) GetWalletBalance(walletID, currency string) {
 	err := i.SendAuthenticatedHTTPRequest("GET", path, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -155,7 +154,7 @@ func (i *ItBit) GetWalletTrades(walletID string, page int64, perPage int64, rang
 	err := i.SendAuthenticatedHTTPRequest("GET", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -170,7 +169,7 @@ func (i *ItBit) GetWalletOrders(walletID string, instrument string, page int64,
 	err := i.SendAuthenticatedHTTPRequest("GET", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -187,7 +186,7 @@ func (i *ItBit) PlaceWalletOrder(walletID, side, orderType, currency string, amo
 	err := i.SendAuthenticatedHTTPRequest("POST", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -196,7 +195,7 @@ func (i *ItBit) GetWalletOrder(walletID, orderID string) {
 	err := i.SendAuthenticatedHTTPRequest("GET", path, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -205,7 +204,7 @@ func (i *ItBit) CancelWalletOrder(walletID, orderID string) {
 	err := i.SendAuthenticatedHTTPRequest("DELETE", path, nil)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -219,7 +218,7 @@ func (i *ItBit) PlaceWithdrawalRequest(walletID, currency, address string, amoun
 	err := i.SendAuthenticatedHTTPRequest("POST", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -231,7 +230,7 @@ func (i *ItBit) GetDepositAddress(walletID, currency string) {
 	err := i.SendAuthenticatedHTTPRequest("POST", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -246,7 +245,7 @@ func (i *ItBit) WalletTransfer(walletID, sourceWallet, destWallet string, amount
 	err := i.SendAuthenticatedHTTPRequest("POST", path, params)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
diff --git a/lakebtchttp.go b/lakebtchttp.go
index a96c25c9..c83cce14 100644
--- a/lakebtchttp.go
+++ b/lakebtchttp.go
@@ -12,7 +12,7 @@ import (
 	"strings"
 	"time"
 	"io/ioutil"
-	"fmt"
+	"log"
 )
 
 const (
@@ -87,7 +87,7 @@ func (l *LakeBTC) GetTicker() (LakeBTCTickerResponse) {
 	response := LakeBTCTickerResponse{}
 	err := SendHTTPRequest(LAKEBTC_API_URL + LAKEBTC_TICKER, true, &response)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return response
 	}
 	return response
@@ -101,7 +101,7 @@ func (l *LakeBTC) GetOrderBook(currency string) (bool) {
 
 	err := SendHTTPRequest(LAKEBTC_API_URL + req, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -110,7 +110,7 @@ func (l *LakeBTC) GetOrderBook(currency string) (bool) {
 func (l *LakeBTC) GetTradeHistory() (bool) {
 	err := SendHTTPRequest(LAKEBTC_API_URL + LAKEBTC_TRADES, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -120,7 +120,7 @@ func (l *LakeBTC) GetAccountInfo() {
 	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_ACCOUNT_INFO, "")
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -135,14 +135,14 @@ func (l *LakeBTC) Trade(orderType int, amount, price float64, currency string) {
 	}
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
 func (l *LakeBTC) GetOrders() {
 	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_ORDERS, "")
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -150,7 +150,7 @@ func (l *LakeBTC) CancelOrder(orderID int64) {
 	params := strconv.FormatInt(orderID, 10)
 	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_CANCEL_ORDER, params)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -163,7 +163,7 @@ func (l *LakeBTC) GetTrades(timestamp time.Time) {
 	
 	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_TRADES, params)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -182,7 +182,7 @@ func (l *LakeBTC) SendAuthenticatedHTTPRequest(method, params string) (err error
 	hmac.Write([]byte(encoded))
 
 	if l.Verbose {
-		fmt.Printf("Sending POST request to %s calling method %s with params %s\n", LAKEBTC_API_URL, method, encoded)
+		log.Printf("Sending POST request to %s calling method %s with params %s\n", LAKEBTC_API_URL, method, encoded)
 	}
 
 	reqBody := strings.NewReader(encoded)
@@ -209,7 +209,7 @@ func (l *LakeBTC) SendAuthenticatedHTTPRequest(method, params string) (err error
 	contents, _ := ioutil.ReadAll(resp.Body)
 
 	if l.Verbose {
-		fmt.Printf("Recieved raw: %s\n", string(contents))
+		log.Printf("Recieved raw: %s\n", string(contents))
 	}
 	
 	resp.Body.Close()
diff --git a/okcoinhttp.go b/okcoinhttp.go
index 269a985f..33cdde81 100644
--- a/okcoinhttp.go
+++ b/okcoinhttp.go
@@ -10,6 +10,7 @@ import (
 	"io/ioutil"
 	"strconv"
 	"fmt"
+	"log"
 )
 
 const (
@@ -103,7 +104,7 @@ func (o *OKCoin) GetTicker(symbol string) (OKCoinTicker) {
 	err := SendHTTPRequest(o.APIUrl + path, true, &resp)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return OKCoinTicker{}
 	}
 	return resp.Ticker
@@ -114,7 +115,7 @@ func (o *OKCoin) GetFuturesTicker(symbol, contractType string) (OKCoinFuturesTic
 	path := fmt.Sprintf("future_ticker.do?symbol=%s&contract_type=%s", symbol, contractType)
 	err := SendHTTPRequest(o.APIUrl + path, true, &resp)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return OKCoinFuturesTicker{}
 	}
 	return resp.Ticker
@@ -124,7 +125,7 @@ func (o *OKCoin) GetOrderBook(symbol string) (bool) {
 	path := "depth.do?symbol=" + symbol
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -134,7 +135,7 @@ func (o *OKCoin) GetFuturesDepth(symbol, contractType string) (bool) {
 	path := fmt.Sprintf("future_depth.do?symbol=%s&contract_type=%s", symbol, contractType)
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -144,7 +145,7 @@ func (o *OKCoin) GetTradeHistory(symbol string) (bool) {
 	path := "trades.do?symbol=" + symbol
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -154,7 +155,7 @@ func (o *OKCoin) GetFuturesTrades(symbol, contractType string) (bool) {
 	path := fmt.Sprintf("future_trades.do?symbol=%s&contract_type=%s", symbol, contractType)
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -164,7 +165,7 @@ func (o *OKCoin) GetFuturesIndex(symbol string) (bool) {
 	path := "future_index.do?symbol=" + symbol
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -173,7 +174,7 @@ func (o *OKCoin) GetFuturesIndex(symbol string) (bool) {
 func (o *OKCoin) GetFuturesExchangeRate() (bool) {
 	err := SendHTTPRequest(o.APIUrl + "exchange_rate.do", true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 	return true
 }
@@ -182,7 +183,7 @@ func (o *OKCoin) GetFuturesEstimatedPrice(symbol string) (bool) {
 	path := "future_estimated_price.do?symbol=" + symbol
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -192,7 +193,7 @@ func (o *OKCoin) GetFuturesTradeHistory(symbol, date string, since int64) (bool)
 	path := fmt.Sprintf("future_trades.do?symbol=%s&date%s&since=%d", symbol, date, since)
 	err := SendHTTPRequest(o.APIUrl + path, true, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 		return false
 	}
 	return true
@@ -204,7 +205,7 @@ func (o *OKCoin) GetUserInfo() {
 	err := o.SendAuthenticatedHTTPRequest("userinfo.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -214,7 +215,7 @@ func (o *OKCoin) GetFuturesUserInfo() {
 	err := o.SendAuthenticatedHTTPRequest("future_userinfo.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -226,7 +227,7 @@ func (o *OKCoin) GetFuturesPosition(symbol, contractType string) {
 	err := o.SendAuthenticatedHTTPRequest("future_userinfo.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -241,7 +242,7 @@ func (o *OKCoin) Trade(amount, price float64, symbol, orderType string) {
 	err := o.SendAuthenticatedHTTPRequest("trade.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -259,7 +260,7 @@ func (o *OKCoin) FuturesTrade(amount, price float64, matchPrice, leverage int64,
 	err := o.SendAuthenticatedHTTPRequest("future_trade.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -273,7 +274,7 @@ func (o *OKCoin) BatchTrade(orderData string, symbol, orderType string) {
 	err := o.SendAuthenticatedHTTPRequest("batch_trade.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -288,7 +289,7 @@ func (o *OKCoin) FuturesBatchTrade(orderData, symbol, contractType string, lever
 	err := o.SendAuthenticatedHTTPRequest("future_batch_trade.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -301,7 +302,7 @@ func (o *OKCoin) CancelOrder(orderID int64, symbol string) {
 	err := o.SendAuthenticatedHTTPRequest("cancel_order.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -315,7 +316,7 @@ func (o *OKCoin) CancelFuturesOrder(orderID int64, symbol, contractType string)
 	err := o.SendAuthenticatedHTTPRequest("future_cancel.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -328,7 +329,7 @@ func (o *OKCoin) GetOrderInfo(orderID int64, symbol string) {
 	err := o.SendAuthenticatedHTTPRequest("orders_info.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -345,7 +346,7 @@ func (o *OKCoin) GetFuturesOrderInfo(orderID, status, currentPage, pageLength in
 	err := o.SendAuthenticatedHTTPRequest("future_order_info.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -359,7 +360,7 @@ func (o *OKCoin) GetOrdersInfo(orderID int64, orderType string, symbol string) {
 	err := o.SendAuthenticatedHTTPRequest("orders_info.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -376,7 +377,7 @@ func (o *OKCoin) GetOrderHistory(orderID, pageLength, currentPage int64, orderTy
 	err := o.SendAuthenticatedHTTPRequest("order_history.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -387,7 +388,7 @@ func (o *OKCoin) GetFuturesUserInfo4Fix() {
 	err := o.SendAuthenticatedHTTPRequest("future_userinfo_4fix.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -401,7 +402,7 @@ func (o *OKCoin) GetFuturesUserPosition4Fix(symbol, contractType string) {
 	err := o.SendAuthenticatedHTTPRequest("future_position_4fix.do", v)
 
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }
 
@@ -415,8 +416,8 @@ func (o *OKCoin) SendAuthenticatedHTTPRequest(method string, v url.Values) (err
 	path := o.APIUrl + method
 
 	if o.Verbose {
-		fmt.Printf("Signature: %s\n", signature)
-		fmt.Printf("Sending POST request to %s with params %s\n", path, encoded)
+		log.Printf("Signature: %s\n", signature)
+		log.Printf("Sending POST request to %s with params %s\n", path, encoded)
 	}
 
 	reqBody := strings.NewReader(encoded)
@@ -438,7 +439,7 @@ func (o *OKCoin) SendAuthenticatedHTTPRequest(method string, v url.Values) (err
 	contents, _ := ioutil.ReadAll(resp.Body)
 
 	if o.Verbose {
-		fmt.Printf("Recieved raw: %s\n", string(contents))
+		log.Printf("Recieved raw: %s\n", string(contents))
 	}
 	
 	resp.Body.Close()
diff --git a/smsglobal.go b/smsglobal.go
index 94c65080..433d4ce6 100644
--- a/smsglobal.go
+++ b/smsglobal.go
@@ -4,7 +4,7 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
-	"fmt"
+	"log"
 	"io/ioutil"
 	"errors"
 )
@@ -39,7 +39,7 @@ func SMSNotify(username, password, from, to, message string) (error) {
 	}
 
 	contents, _ := ioutil.ReadAll(resp.Body)
-	fmt.Printf("Recieved raw: %s\n", string(contents))
+	log.Printf("Recieved raw: %s\n", string(contents))
 	resp.Body.Close()
 	return nil
 }
\ No newline at end of file