diff --git a/client/client.go b/client/client.go
index 57783bf..af2feb7 100644
--- a/client/client.go
+++ b/client/client.go
@@ -447,7 +447,18 @@ func NewClient(standalone bool) (HoustonClient, error) {
 		}
 	}()
 
-	hc.shutdownFunc = cancel
+	hc.shutdownFunc = func() {
+		// child process 강제 종료
+		for _, procmeta := range hc.childProcs {
+			if procmeta.cmd != nil && procmeta.cmd.Process != nil {
+				procmeta.cmd.Process.Signal(os.Kill)
+				procmeta.cmd.Process.Wait()
+				procmeta.cmd.Process.Release()
+			}
+		}
+		cancel()
+	}
+
 	hc.exitChan = exitChan
 	hc.ctx = ctx
 	hc.operationChan = operationChan