diff --git a/internal/bbsimctl/commands/olt.go b/internal/bbsimctl/commands/olt.go
index a16edef..5f6747e 100644
--- a/internal/bbsimctl/commands/olt.go
+++ b/internal/bbsimctl/commands/olt.go
@@ -69,7 +69,7 @@
 }
 
 func RegisterOltCommands(parser *flags.Parser) {
-	parser.AddCommand("olt", "OLT Commands", "Commands to query and manipulate the OLT device", &oltOptions{})
+	_, _ = parser.AddCommand("olt", "OLT Commands", "Commands to query and manipulate the OLT device", &oltOptions{})
 }
 
 func getOLT() *pb.Olt {
@@ -103,7 +103,7 @@
 
 	// print out
 	tableFormat := format.Format(DEFAULT_OLT_DEVICE_HEADER_FORMAT)
-	tableFormat.Execute(os.Stdout, true, olt)
+	_ = tableFormat.Execute(os.Stdout, true, olt)
 
 	return nil
 }
@@ -114,7 +114,7 @@
 	printOltHeader("NNI Ports for", olt)
 
 	tableFormat := format.Format(DEFAULT_PORT_HEADER_FORMAT)
-	tableFormat.Execute(os.Stdout, true, olt.NNIPorts)
+	_ = tableFormat.Execute(os.Stdout, true, olt.NNIPorts)
 
 	return nil
 }
@@ -125,7 +125,7 @@
 	printOltHeader("PON Ports for", olt)
 
 	tableFormat := format.Format(DEFAULT_PORT_HEADER_FORMAT)
-	tableFormat.Execute(os.Stdout, true, olt.PONPorts)
+	_ = tableFormat.Execute(os.Stdout, true, olt.PONPorts)
 
 	return nil
 }