diff --git a/server/executor.py b/server/executor.py
index 41ee405..985d0de 100644
--- a/server/executor.py
+++ b/server/executor.py
@@ -40,7 +40,7 @@ class Executor:
                 directories = self.currentDirectory.split(os.path.sep)
                 strdirectory = ""
                 for dir in directories:
-                    strdirectory += dir + os.path.sep
+                    strdirectory = os.path.join(strdirectory, dir)
                     strdirectory = strdirectory[:-3]
                 if os.path.exists(os.path.join(self.baseDir, self.currentDirectory)):
                     self.currentDirectory = strdirectory