diff --git a/wipeboltcard.go b/wipeboltcard.go
index ed4a9fa..1e6e927 100644
--- a/wipeboltcard.go
+++ b/wipeboltcard.go
@@ -2,8 +2,8 @@ package main
 
 import (
 	log "github.com/sirupsen/logrus"
-	"strconv"
 	"net/http"
+	"strconv"
 )
 
 type card_wipe_info struct {
@@ -17,34 +17,34 @@ type card_wipe_info struct {
 }
 
 func wipeboltcard(w http.ResponseWriter, r *http.Request) {
-        if db_get_setting("FUNCTION_INTERNAL_API") != "ENABLE" {
-                msg := "wipeboltcard: internal API function is not enabled"
-                log.Debug(msg)
-                write_error_message(w, msg)
-                return
-        }
+	if db_get_setting("FUNCTION_INTERNAL_API") != "ENABLE" {
+		msg := "wipeboltcard: internal API function is not enabled"
+		log.Debug(msg)
+		write_error_message(w, msg)
+		return
+	}
 
 	card_name := r.URL.Query().Get("card_name")
 
 	// check if card_name has been given
 
 	if card_name == "" {
-                msg := "wipeboltcard: the card name must be set"
-                log.Warn(msg)
-                write_error_message(w, msg)
-                return
+		msg := "wipeboltcard: the card name must be set"
+		log.Warn(msg)
+		write_error_message(w, msg)
+		return
 	}
 
 	// check if card_name exists
 
 	card_count, err := db_get_card_name_count(card_name)
 
-        if card_count == 0 {
-                msg := "the card name does not exist in the database"
-                log.Warn(msg)
-                write_error_message(w, msg)
-                return
-        }
+	if card_count == 0 {
+		msg := "the card name does not exist in the database"
+		log.Warn(msg)
+		write_error_message(w, msg)
+		return
+	}
 
 	// set the card as wiped and disabled, get the keys
 
@@ -56,12 +56,12 @@ func wipeboltcard(w http.ResponseWriter, r *http.Request) {
 
 	// log the request
 
-        log.WithFields(log.Fields{
-                "card_name": card_name}).Info("wipeboltcard API request")
+	log.WithFields(log.Fields{
+		"card_name": card_name}).Info("wipeboltcard API request")
 
 	// generate a response
 
-        jsonData := `{"status":"OK",` +
+	jsonData := `{"status":"OK",` +
 		`"action": "wipe",` +
 		`"id": ` + strconv.Itoa(card_wipe_info_values.id) + `,` +
 		`"k0": "` + card_wipe_info_values.k0 + `",` +
@@ -72,12 +72,12 @@ func wipeboltcard(w http.ResponseWriter, r *http.Request) {
 		`"uid": "` + card_wipe_info_values.uid + `",` +
 		`"version": 1}`
 
-        // log the response
+	// log the response
 
-        log.WithFields(log.Fields{
-                "card_name": card_name, "response": jsonData}).Info("wipeboltcard API response")
+	log.WithFields(log.Fields{
+		"card_name": card_name, "response": jsonData}).Info("wipeboltcard API response")
 
-        w.Header().Set("Content-Type", "application/json")
-        w.WriteHeader(http.StatusOK)
-        w.Write([]byte(jsonData))
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(jsonData))
 }