diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 158ae05..9ee4883
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@
     install_requires=[
         "future",
         "rpyc==3.4.4;python_version<='2.7'",
-        "rpyc==4.0.2;python_version>'3'",
+        "rpyc==6.0.0;python_version>'3'",
         "six==1.16.0",
     ],
 )
diff --git a/tox.ini b/tox.ini
index 0e31b49..1aaa3c4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ deps=pytest==3.10.1;python_version<'3'
      pytest;python_version>='3'
      six
      rpyc==3.4.4;python_version<='2.7'
-     rpyc==4.0.2;python_version>'3'
+     rpyc==6.0.0;python_version>'3'
      hypothesis
      mock
      pytz