diff --git a/.travis.yml b/.travis.yml
index 7fa94434..b79c37c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ python:
   - "pypy3"
 
 install:
-  - "pip install flake8 pylint pytest requests isort"
+  - "pip install flake8 pylint pytest requests 'isort<5.0'"
 
 script:
   - "make flake8"