diff --git a/requirements-dev.txt b/requirements-dev.txt
index fb115e8cf..e6a358e49 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -13,7 +13,7 @@ pytest-asyncio==0.15.1
 pytest-cov==2.12.1
 pytest-mock==3.6.1
 pytest-random-order==1.0.4
-isort==5.8.0
+isort==5.9.1
 
 # Convert jupyter notebooks to markdown documents
 nbconvert==6.0.7