diff --git a/routersploit/core/exploit/shell.py b/routersploit/core/exploit/shell.py
index eb8e1c73..b1060047 100644
--- a/routersploit/core/exploit/shell.py
+++ b/routersploit/core/exploit/shell.py
@@ -178,7 +178,7 @@ def serve_forever(self, content):
 
 
 class Communication:
-    def __init__(self, exploit, payload, options, location="", wget_options={}, echo_options={}, exec_binary=None):
+    def __init__(self, exploit, payload, options, location="", wget_options=None, echo_options=None, exec_binary=None):
         self.exploit = exploit
         self.payload = payload
         self.options = {option[0]: option[1] for option in options}
@@ -187,8 +187,8 @@ def __init__(self, exploit, payload, options, location="", wget_options={}, echo
         self.location = location
 
         # transfer techniques
-        self.wget_options = wget_options
-        self.echo_options = echo_options
+        self.wget_options = wget_options if wget_options is not None else {}
+        self.echo_options = echo_options if echo_options is not None else {}
 
         # process of executing payload
         self.exec_binary = exec_binary