diff --git a/go.mod b/go.mod
index 70e85acecb..8bb369f3b7 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	gitea.com/go-chi/cache v0.0.0-20210110083709-82c4c9ce2d5e
 	gitea.com/go-chi/captcha v0.0.0-20210110083842-e7696c336a1e
 	gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee
-	gitea.com/lunny/levelqueue v0.3.0
+	gitea.com/lunny/levelqueue v0.4.0
 	github.com/Microsoft/go-winio v0.5.0 // indirect
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/ProtonMail/go-crypto v0.0.0-20210705153151-cc34b1f6908b // indirect
diff --git a/go.sum b/go.sum
index d8afa3ec4c..b8815e4136 100644
--- a/go.sum
+++ b/go.sum
@@ -51,6 +51,8 @@ gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee h1:9U6HuKUBt/cGK6T/6
 gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee/go.mod h1:Ozg8IchVNb/Udg+ui39iHRYqVHSvf3C99ixdpLR8Vu0=
 gitea.com/lunny/levelqueue v0.3.0 h1:MHn1GuSZkxvVEDMyAPqlc7A3cOW+q8RcGhRgH/xtm6I=
 gitea.com/lunny/levelqueue v0.3.0/go.mod h1:HBqmLbz56JWpfEGG0prskAV97ATNRoj5LDmPicD22hU=
+gitea.com/lunny/levelqueue v0.4.0 h1:v+bCR1lwLTBpZMshguWNhGIFLkUj+R04pgaU3TcJFS8=
+gitea.com/lunny/levelqueue v0.4.0/go.mod h1:HBqmLbz56JWpfEGG0prskAV97ATNRoj5LDmPicD22hU=
 gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=
 gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:EXuID2Zs0pAQhH8yz+DNjUbjppKQzKFAn28TMYPB6IU=
 github.com/6543/go-version v1.3.1 h1:HvOp+Telns7HWJ2Xo/05YXQSB2bE0WmVgbHqwMPZT4U=
diff --git a/vendor/gitea.com/lunny/levelqueue/queue.go b/vendor/gitea.com/lunny/levelqueue/queue.go
index 0570cc572d..948e019be8 100644
--- a/vendor/gitea.com/lunny/levelqueue/queue.go
+++ b/vendor/gitea.com/lunny/levelqueue/queue.go
@@ -295,6 +295,11 @@ func (queue *Queue) LHandle(h func([]byte) error) error {
 
 // Close closes the queue (and the underlying db is set to closeUnderlyingDB)
 func (queue *Queue) Close() error {
+	queue.highLock.Lock()
+	queue.lowLock.Lock()
+	defer queue.highLock.Unlock()
+	defer queue.lowLock.Unlock()
+
 	if !queue.closeUnderlyingDB {
 		queue.db = nil
 		return nil
diff --git a/vendor/gitea.com/lunny/levelqueue/set.go b/vendor/gitea.com/lunny/levelqueue/set.go
index f5995cb8f1..7e0e65c554 100644
--- a/vendor/gitea.com/lunny/levelqueue/set.go
+++ b/vendor/gitea.com/lunny/levelqueue/set.go
@@ -107,6 +107,8 @@ func (set *Set) Remove(value []byte) (bool, error) {
 
 // Close closes the set (and the underlying db if set to closeUnderlyingDB)
 func (set *Set) Close() error {
+	set.lock.Lock()
+	defer set.lock.Unlock()
 	if !set.closeUnderlyingDB {
 		set.db = nil
 		return nil
diff --git a/vendor/gitea.com/lunny/levelqueue/uniquequeue.go b/vendor/gitea.com/lunny/levelqueue/uniquequeue.go
index a53abb2c4e..8d66e008de 100644
--- a/vendor/gitea.com/lunny/levelqueue/uniquequeue.go
+++ b/vendor/gitea.com/lunny/levelqueue/uniquequeue.go
@@ -181,6 +181,8 @@ func (queue *UniqueQueue) Len() int64 {
 func (queue *UniqueQueue) Close() error {
 	_ = queue.q.Close()
 	_ = queue.set.Close()
+	queue.set.lock.Lock()
+	defer queue.set.lock.Unlock()
 	if !queue.closeUnderlyingDB {
 		queue.db = nil
 		return nil
diff --git a/vendor/modules.txt b/vendor/modules.txt
index e3fe6e6b79..32251f41e0 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -25,7 +25,7 @@ gitea.com/go-chi/session/couchbase
 gitea.com/go-chi/session/memcache
 gitea.com/go-chi/session/mysql
 gitea.com/go-chi/session/postgres
-# gitea.com/lunny/levelqueue v0.3.0
+# gitea.com/lunny/levelqueue v0.4.0
 ## explicit
 gitea.com/lunny/levelqueue
 # github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c