diff --git a/json_utility.go b/json_utility.go
index b5a3aa9..5ce4f01 100644
--- a/json_utility.go
+++ b/json_utility.go
@@ -7,8 +7,10 @@ import (
 	"gopkg.in/rana/ora.v3"
 	"io"
 	"io/ioutil"
+	"sync"
 )
 
+var mu = &sync.Mutex{}
 var allPayloads []payloadBuff
 
 type LangMap map[string]map[string]string
@@ -134,6 +136,8 @@ func loadCorrelations(id string) []CorrelationField {
 
 func InitTables(db *ora.Ses, project string) error {
 	jsonbuf, _ := fetchJSON(db, EqualQuotes(project))
+	mu.Lock()
+	defer mu.Unlock()
 	json.Unmarshal(jsonbuf, &allPayloads)
 	if len(allPayloads) == 0 {
 		return errors.New("tables config is corrupt")