diff --git a/process.go b/process.go
index 76cfc5d..63fc7a0 100644
--- a/process.go
+++ b/process.go
@@ -56,6 +56,11 @@ func (p *Process) Info() Info {
 		pid = p.cmd.Process.Pid
 	}
 
+	duration := p.Duration
+	if p.Status == StatusRunning {
+		duration = time.Since(p.StartedAt)
+	}
+
 	return Info{
 		ID:        p.ID,
 		Command:   p.Command,
@@ -65,7 +70,7 @@ func (p *Process) Info() Info {
 		Running:   p.Status == StatusRunning,
 		Status:    p.Status,
 		ExitCode:  p.ExitCode,
-		Duration:  p.Duration,
+		Duration:  duration,
 		PID:       pid,
 	}
 }
diff --git a/process_test.go b/process_test.go
index 91c3405..ed91eb3 100644
--- a/process_test.go
+++ b/process_test.go
@@ -40,6 +40,25 @@ func TestProcess_Info_Pending(t *testing.T) {
 	assert.False(t, info.Running)
 }
 
+func TestProcess_Info_RunningDuration(t *testing.T) {
+	svc, _ := newTestService(t)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	proc, err := svc.Start(ctx, "sleep", "10")
+	require.NoError(t, err)
+
+	time.Sleep(10 * time.Millisecond)
+	info := proc.Info()
+	assert.True(t, info.Running)
+	assert.Equal(t, StatusRunning, info.Status)
+	assert.Greater(t, info.Duration, time.Duration(0))
+
+	cancel()
+	<-proc.Done()
+}
+
 func TestProcess_InfoSnapshot(t *testing.T) {
 	svc, _ := newTestService(t)