diff --git a/requirements-ci.txt b/requirements-ci.txt
index ef897b7..814133b 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -3,7 +3,7 @@ setuptools-rust==0.8.3
 flake8==3.5.0
 pyflakes==1.6.0
 sphinx==1.6.7
-isort==4.2.15
+isort==4.3.4
 sphinxcontrib-asyncio==0.2.0
 sphinxcontrib-newsfeed==0.1.4
 pytest==3.3.2