diff --git a/csgo/demo_parser.go b/csgo/demo_parser.go
index 171c5c8..44e7284 100644
--- a/csgo/demo_parser.go
+++ b/csgo/demo_parser.go
@@ -128,7 +128,9 @@ func (p *DemoParser) parseWorker() {
 			if err != nil {
 				switch e := err.(type) {
 				case DemoNotFoundError:
+					p.lock.Lock()
 					err := tMatch.Update().SetDemoExpired(true).Exec(context.Background())
+					p.lock.Unlock()
 					if err != nil {
 						log.Errorf("[DP] Unable to set demo expire for match %d: %v", demo.MatchId, e)
 						continue