diff --git a/Python_script/PostPlot.py b/Python_script/PostPlot.py
index f75d13ea91b57ed14d5eaa99efab3fb710b85803..40cb08424cd45620acb4354b37a51eff3baab837 100644
--- a/Python_script/PostPlot.py
+++ b/Python_script/PostPlot.py
@@ -114,7 +114,7 @@ class PostPlot:
         if not os.path.exists(storepath):
             os.makedirs(storepath)
         
-        self.fig.savefig(storepath + '\\' + filename)
+        self.fig.savefig(os.path.join(storepath, filename))
     
     # scaling time axes depending on the time unit
     def scaling_time_axes(self, time_sec, time_unit):