diff --git a/client/admin/stores/SettingsStore.tsx b/client/admin/stores/SettingsStore.tsx
index a13a690..071c15d 100644
--- a/client/admin/stores/SettingsStore.tsx
+++ b/client/admin/stores/SettingsStore.tsx
@@ -38,7 +38,7 @@ export class SettingsStore extends StoreBase {
     @observable
     public ssrPageCache: boolean;
 
-    @observable
+    @observable.shallow
     public cloudflare: ICloudflare;
 
     constructor() {
diff --git a/server/controllers/settings.go b/server/controllers/settings.go
index 985afa5..dcb98c7 100644
--- a/server/controllers/settings.go
+++ b/server/controllers/settings.go
@@ -3,6 +3,7 @@ package controllers
 import (
 	"github.com/labstack/echo/v4"
 	"github.com/mohemohe/parakeet/server/models"
+	"github.com/mohemohe/parakeet/server/util"
 	"net/http"
 )
 
@@ -187,7 +188,7 @@ func SetCloudflare(c echo.Context) error {
 		panic("bind error")
 	}
 
-	if err := models.SetKVS(models.KVCloudflare, reqBody); err != nil {
+	if err := models.SetKVS(models.KVCloudflare, util.StructToJsonMap(reqBody)); err != nil {
 		panic(err)
 	}
 
diff --git a/server/models/cache.go b/server/models/cache.go
index 4a89b13..5bb0c0a 100644
--- a/server/models/cache.go
+++ b/server/models/cache.go
@@ -28,13 +28,17 @@ func SetCache(key string, value interface{}) error {
 	return connection.DsCache().Set(key, v, 365*24*time.Hour)
 }
 
+func PurgeInternalCache() {
+	connection.PurgeDsCache()
+
+	if err := pubsub.Publish(purgeCacheEvent, ""); err != nil {
+		util.Logger().Warn(err)
+	}
+}
+
 func PurgeCache() {
 	go func() {
-		connection.PurgeDsCache()
-
-		if err := pubsub.Publish(purgeCacheEvent, ""); err != nil {
-			util.Logger().Warn(err)
-		}
+		PurgeInternalCache()
 
 		if kv := GetKVS(KVCloudflare); kv != nil {
 			v := new(Cloudflare)
diff --git a/server/models/entry.go b/server/models/entry.go
index faac652..12d5b05 100644
--- a/server/models/entry.go
+++ b/server/models/entry.go
@@ -62,6 +62,9 @@ func GetEntries(perPage int, page int, includeDraft bool) *Entries {
 
 	entries := new(Entries)
 	if err := GetCache(cacheKey, entries); err == nil {
+		if len(entries.Entries) == 0 {
+			entries.Entries = []Entry{}
+		}
 		return entries
 	}
 
@@ -86,6 +89,9 @@ func GetEntries(perPage int, page int, includeDraft bool) *Entries {
 	for i := 0; i < info.RecordsOnPage; i++ {
 		_ = find.Next(&entryArray[i])
 	}
+	if len(entryArray) == 0 {
+		entryArray = []Entry{}
+	}
 
 	entries = &Entries{
 		Info:    info,
diff --git a/server/models/kvs.go b/server/models/kvs.go
index 4097086..ac165d5 100644
--- a/server/models/kvs.go
+++ b/server/models/kvs.go
@@ -35,6 +35,7 @@ func GetKVS(key string) *KV {
 func SetKVS(key string, value interface{}) error {
 	_, err := connection.Mongo().Collection(collections.KVS).Collection().Upsert(bson.M{"key": key}, bson.M{"key": key, "value": value})
 	if err == nil {
+		PurgeInternalCache()
 		_ = SetCache("kvs:"+key, value)
 	}
 	return err
diff --git a/server/models/model.go b/server/models/model.go
index d54640e..03a887d 100644
--- a/server/models/model.go
+++ b/server/models/model.go
@@ -68,22 +68,22 @@ func InitDB() {
 
 	setDefaultConfig(KVSiteTitle, "parakeet")
 	setDefaultConfig(KVSideNavContents, []string{})
-	setDefaultConfig(KVNotifyMastodon, NotifyMastodon{
+	setDefaultConfig(KVNotifyMastodon, util.StructToJsonMap(NotifyMastodon{
 		BaseURL:  "",
 		Token:    "",
 		Template: "ブログを書きました: %ENTRY_TITLE% %ENTRY_URL%",
-	})
-	setDefaultConfig(KVServerSideRendering, ServerSideRendering{
+	}))
+	setDefaultConfig(KVServerSideRendering, util.StructToJsonMap(ServerSideRendering{
 		Entries: true,
 		Entry:   true,
-	})
+	}))
 	setDefaultConfig(KVEnableMongoDBQueryCache, true)
 	setDefaultConfig(KVEnableSSRPageCache, false)
-	setDefaultConfig(KVCloudflare, Cloudflare{
+	setDefaultConfig(KVCloudflare, util.StructToJsonMap(Cloudflare{
 		Enable:   false,
 		ZoneID:   "",
 		APIToken: "",
-	})
+	}))
 
 	user := GetUserByEmail("root")
 	if user == nil {
diff --git a/server/util/map.go b/server/util/map.go
new file mode 100644
index 0000000..acbbf89
--- /dev/null
+++ b/server/util/map.go
@@ -0,0 +1,31 @@
+package util
+
+import (
+	"reflect"
+)
+
+func StructToJsonMap(item interface{}) map[string]interface{} {
+	m := map[string]interface{}{}
+
+	v := reflect.ValueOf(item)
+	v = reflect.Indirect(v)
+
+	t := reflect.TypeOf(item)
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	for i := 0; i < t.NumField(); i++ {
+		tag := t.Field(i).Tag.Get("json")
+		f := v.Field(i).Interface()
+		if tag != "" && tag != "-" {
+			if t.Field(i).Type.Kind() == reflect.Struct {
+				m[tag] = StructToJsonMap(f)
+			} else {
+				m[tag] = f
+			}
+		}
+	}
+
+	return m
+}