1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index caf0de4ee..91b976e64 100644
--- a/tox.ini
+++ b/tox.ini
@@ -81,7 +81,7 @@ commands = {[testenv:pydef]commands}
 [testenv:isort]
 deps =
     {[testenv]deps}
-    isort>=4.0.0
+    isort>=4.2.0
 whitelist_externals =
     {[testenv]whitelist_externals}
     isort