diff --git a/pipe_io_server/pipe_io_server.py b/pipe_io_server/pipe_io_server.py
index bba85ae..33d6772 100644
--- a/pipe_io_server/pipe_io_server.py
+++ b/pipe_io_server/pipe_io_server.py
@@ -10,7 +10,7 @@ from .pipe import Pipe
 
 class PipeIOServer(ABC):
     def __init__(self, in_pipe=None, out_pipe=None):
-        self.in_pipe, self.out_pipe = in_pipe, out_pipe
+        self._in_pipe, self._out_pipe = in_pipe, out_pipe
         self._io_threads = None
         self._create_pipes()
         self._init_io_threads()
@@ -18,11 +18,19 @@ class PipeIOServer(ABC):
     def _create_pipes(self):
         if not self.in_pipe or not self.out_pipe:
             pipe_id = token_urlsafe(6)
-            self.in_pipe = join('/tmp', f'in_pipe_{pipe_id}')
-            self.out_pipe = join('/tmp', f'out_pipe_{pipe_id}')
+            self._in_pipe = join('/tmp', f'in_pipe_{pipe_id}')
+            self._out_pipe = join('/tmp', f'out_pipe_{pipe_id}')
         Pipe(self.in_pipe).recreate()
         Pipe(self.out_pipe).recreate()
 
+    @property
+    def in_pipe(self):
+        return self._in_pipe
+
+    @property
+    def out_pipe(self):
+        return self._out_pipe
+
     def _init_io_threads(self):
         io_threads_dict = {
             'reader': PipeReaderThread(self.in_pipe, self.handle_message),