diff --git a/learn-python/requirements.txt b/learn-python/requirements.txt
index a6092fca..63d298a1 100644
--- a/learn-python/requirements.txt
+++ b/learn-python/requirements.txt
@@ -2,7 +2,7 @@ astroid==2.0.4
 atomicwrites==1.1.5
 attrs==18.1.0
 flake8==3.5.0
-isort==4.3.4
+isort==4.3.21
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
 more-itertools==4.3.0