diff --git a/main.go b/main.go
index 670a761..89d9d72 100644
--- a/main.go
+++ b/main.go
@@ -194,6 +194,11 @@ func (s *Script) Stop(lock bool) error {
 			signal = syscall.SIGKILL
 		}
 
+		// make sure the process is not dead
+		if s.command.ProcessState != nil && s.command.ProcessState.Exited() {
+			return nil
+		}
+
 		if err := syscall.Kill(-s.command.Process.Pid, signal); err != nil {
 			log.Printf("error killing previous process: %v", err)
 			return err
diff --git a/zqdgr.config.json b/zqdgr.config.json
index 50a4098..57fb854 100644
--- a/zqdgr.config.json
+++ b/zqdgr.config.json
@@ -1,6 +1,6 @@
 {
     "name": "zqdgr",
-    "version": "0.0.4",
+    "version": "0.0.4a",
     "description": "zqdgr is a quick and dirty Golang runner",
     "author": "juls0730",
     "license": "BSL-1.0",