diff --git a/home/config.go b/home/config.go
index ca576f45..41071c61 100644
--- a/home/config.go
+++ b/home/config.go
@@ -58,6 +58,10 @@ type configuration struct {
 	transport        *http.Transport
 	client           *http.Client
 
+	// cached version.json to avoid hammering github.io for each page reload
+	versionCheckJSON     []byte
+	versionCheckLastTime time.Time
+
 	BindHost     string `yaml:"bind_host"`     // BindHost is the IP address of the HTTP server to bind to
 	BindPort     int    `yaml:"bind_port"`     // BindPort is the port the HTTP server
 	AuthName     string `yaml:"auth_name"`     // AuthName is the basic auth username
diff --git a/home/control.go b/home/control.go
index e6c41d92..0a2c6f43 100644
--- a/home/control.go
+++ b/home/control.go
@@ -24,10 +24,6 @@ import (
 
 const updatePeriod = time.Minute * 30
 
-// cached version.json to avoid hammering github.io for each page reload
-var versionCheckJSON []byte
-var versionCheckLastTime time.Time
-
 var protocols = []string{"tls://", "https://", "tcp://", "sdns://"}
 
 // ----------------
diff --git a/home/control_update.go b/home/control_update.go
index c6babbf1..3e02d71d 100644
--- a/home/control_update.go
+++ b/home/control_update.go
@@ -74,8 +74,8 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	now := time.Now()
 	if !req.RecheckNow {
 		config.controlLock.Lock()
-		cached := now.Sub(versionCheckLastTime) <= versionCheckPeriod && len(versionCheckJSON) != 0
-		data := versionCheckJSON
+		cached := now.Sub(config.versionCheckLastTime) <= versionCheckPeriod && len(config.versionCheckJSON) != 0
+		data := config.versionCheckJSON
 		config.controlLock.Unlock()
 
 		if cached {
@@ -104,8 +104,8 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	}
 
 	config.controlLock.Lock()
-	versionCheckLastTime = now
-	versionCheckJSON = body
+	config.versionCheckLastTime = now
+	config.versionCheckJSON = body
 	config.controlLock.Unlock()
 
 	w.Header().Set("Content-Type", "application/json")
@@ -501,12 +501,12 @@ func finishUpdate(u *updateInfo) {
 func handleUpdate(w http.ResponseWriter, r *http.Request) {
 	log.Tracef("%s %v", r.Method, r.URL)
 
-	if len(versionCheckJSON) == 0 {
+	if len(config.versionCheckJSON) == 0 {
 		httpError(w, http.StatusBadRequest, "/update request isn't allowed now")
 		return
 	}
 
-	u, err := getUpdateInfo(versionCheckJSON)
+	u, err := getUpdateInfo(config.versionCheckJSON)
 	if err != nil {
 		httpError(w, http.StatusInternalServerError, "%s", err)
 		return