diff --git a/internal/util/pipeline/pipeline.go b/internal/util/pipeline/pipeline.go
index cfc0db3e59..6e85f2d998 100644
--- a/internal/util/pipeline/pipeline.go
+++ b/internal/util/pipeline/pipeline.go
@@ -69,6 +69,11 @@ func (p *pipeline) Start() error {
 }
 
 func (p *pipeline) Close() {
+	for _, node := range p.nodes {
+		if node.Checker != nil {
+			node.Checker.Close()
+		}
+	}
 }
 
 func (p *pipeline) process() {