diff --git a/collectors/domain_stats.go b/collectors/domain_stats.go
index 50f7260..40bd254 100644
--- a/collectors/domain_stats.go
+++ b/collectors/domain_stats.go
@@ -313,11 +313,17 @@ func (c *DomainStatsCollector) Collect(ch chan<- prometheus.Metric) {
 		log.Errorln(err)
 		return
 	}
-
 	defer func() {
-		_, err := conn.Close()
+		alive, err := conn.IsAlive()
 		if err != nil {
 			log.Errorln(err)
+			return
+		}
+		if alive {
+			_, err := conn.Close()
+			if err != nil {
+				log.Errorln(err)
+			}
 		}
 	}()
 
diff --git a/collectors/version.go b/collectors/version.go
index f0372f5..3186b71 100644
--- a/collectors/version.go
+++ b/collectors/version.go
@@ -52,11 +52,17 @@ func (c *VersionCollector) Collect(ch chan<- prometheus.Metric) {
 		log.Errorln(err)
 		return
 	}
-
 	defer func() {
-		_, err := conn.Close()
+		alive, err := conn.IsAlive()
 		if err != nil {
 			log.Errorln(err)
+			return
+		}
+		if alive {
+			_, err := conn.Close()
+			if err != nil {
+				log.Errorln(err)
+			}
 		}
 	}()