diff --git a/ee/backend/pkg/db/clickhouse/connector.go b/ee/backend/pkg/db/clickhouse/connector.go
index 0851ac76a..0ff49a06a 100644
--- a/ee/backend/pkg/db/clickhouse/connector.go
+++ b/ee/backend/pkg/db/clickhouse/connector.go
@@ -4,6 +4,8 @@ import (
 	"log"
 	"database/sql"
 	_ "github.com/ClickHouse/clickhouse-go"
+
+	"openreplay/backend/pkg/license"
 )
 
 type Connector struct {
@@ -27,6 +29,8 @@ type Connector struct {
 }
 
 func NewConnector(url string) *Connector {
+	license.CheckLicense()
+
 	db, err := sql.Open("clickhouse", url)
 	if err != nil {
 		log.Fatalln(err)
diff --git a/ee/backend/pkg/license/check.go b/ee/backend/pkg/license/check.go
new file mode 100644
index 000000000..6b33a625e
--- /dev/null
+++ b/ee/backend/pkg/license/check.go
@@ -0,0 +1,61 @@
+package license
+
+import (
+	"log"
+	"net/http"
+	"encoding/json"
+	"io/ioutil"
+	"bytes"
+
+	"openreplay/backend/pkg/env"
+)
+
+
+
+type request struct {
+	MID string  `json:"mid"`
+	License string `json:"license"`
+}
+
+type response struct {
+	Data struct {
+		IsValid bool `json:"valid"`
+		ExpirationTimestamp int64 `json:"expiration"`
+	} `json:"data"`
+}
+
+
+func CheckLicense() {
+	license := env.String("LICENSE_KEY")
+
+	requestBody, err := json.Marshal(request{ License: license })
+	if err != nil {
+		log.Fatal("Can not form a license check request.")
+	}
+
+	resp, err := http.Post("https://parrot.asayer.io/os/license", "application/json", bytes.NewReader(requestBody))
+	if err != nil {
+		log.Fatalf("Error while checking license. %v", err)
+	}
+
+	if resp.StatusCode != 200 {
+		log.Fatal("Error on license check request.")
+	}
+
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		log.Fatalf("Error while reading license check response. %v", err)
+	}
+
+	respJson := new(response)
+	if err = json.Unmarshal(body, respJson); err != nil {
+		log.Fatalf("Error while parsing license check response. %v", err)
+	}
+
+	if !respJson.Data.IsValid {
+		log.Fatal("License is not valid.")
+	}
+
+
+}
\ No newline at end of file
diff --git a/ee/backend/pkg/queue/import.go b/ee/backend/pkg/queue/import.go
index d1443c40e..abff07e9a 100644
--- a/ee/backend/pkg/queue/import.go
+++ b/ee/backend/pkg/queue/import.go
@@ -3,13 +3,16 @@ package queue
 import (
 	"openreplay/backend/pkg/kafka"
 	"openreplay/backend/pkg/queue/types"
+	"openreplay/backend/pkg/license"
 )
 
 func NewConsumer(group string, topics []string, handler types.MessageHandler) types.Consumer {
+	license.CheckLicense()
 	return kafka.NewConsumer(group, topics, handler)
 }
 
 func NewProducer() types.Producer {
+	license.CheckLicense()
 	return kafka.NewProducer()
 }
 
diff --git a/ee/backend/services/db/stats.go b/ee/backend/services/db/stats.go
index b2fcb3f67..67825e2a2 100644
--- a/ee/backend/services/db/stats.go
+++ b/ee/backend/services/db/stats.go
@@ -12,7 +12,7 @@ import (
 )
 
 var ch *clickhouse.Connector
-var finalizeTicker *time.Ticker
+var finalizeTicker <-chan time.Time
 
 func initStats() {
 	ch = clickhouse.NewConnector(env.String("CLICKHOUSE_STRING"))
@@ -20,7 +20,7 @@ func initStats() {
 		log.Fatalf("Clickhouse prepare error: %v\n", err)
 	}
 
-  finalizeTicker = time.NewTicker(20 * time.Minute)
+  finalizeTicker = time.Tick(20 * time.Minute)
 
 }