diff --git a/common/httputilz/httputilz.go b/common/httputilz/httputilz.go
index a191446..a1db8de 100644
--- a/common/httputilz/httputilz.go
+++ b/common/httputilz/httputilz.go
@@ -51,10 +51,10 @@ func ParseRequest(req string) (method string, path string, headers map[string]st
 	method = parts[0]
 
 	for {
-		line, err := reader.ReadString('\n')
+		line, readErr := reader.ReadString('\n')
 		line = strings.TrimSpace(line)
 
-		if err != nil || line == "" {
+		if readErr != nil || line == "" {
 			break
 		}
 
diff --git a/common/httpx/httpx.go b/common/httpx/httpx.go
index ad31cd5..f8de90f 100644
--- a/common/httpx/httpx.go
+++ b/common/httpx/httpx.go
@@ -77,9 +77,9 @@ func New(options *Options) (*HTTPX, error) {
 	}
 
 	if httpx.Options.HttpProxy != "" {
-		proxyURL, err := url.Parse(httpx.Options.HttpProxy)
-		if err != nil {
-			return nil, err
+		proxyURL, parseErr := url.Parse(httpx.Options.HttpProxy)
+		if parseErr != nil {
+			return nil, parseErr
 		}
 		transport.Proxy = http.ProxyURL(proxyURL)
 	}
diff --git a/common/stringz/stringz.go b/common/stringz/stringz.go
index 5199fa8..adaa0a3 100644
--- a/common/stringz/stringz.go
+++ b/common/stringz/stringz.go
@@ -21,8 +21,8 @@ func StringToSliceInt(s string) ([]int, error) {
 		return r, nil
 	}
 	for _, v := range strings.Split(s, ",") {
-		v := strings.TrimSpace(v)
-		if i, err := strconv.Atoi(v); err == nil {
+		vTrim := strings.TrimSpace(v)
+		if i, err := strconv.Atoi(vTrim); err == nil {
 			r = append(r, i)
 		} else {
 			return r, err