diff --git a/setup.py b/setup.py
index a353555..d3cd425 100755
--- a/setup.py
+++ b/setup.py
@@ -184,7 +184,7 @@ extras_require = dict(
 
 install_requires = [
     'setuptools>=18.5',
-    'jedi>=0.16',
+    'jedi>=0.16,<0.18.0',
     'decorator',
     'pickleshare',
     'traitlets>=4.2',