diff --git a/news/3 Code Health/5642.md b/news/3 Code Health/5642.md
new file mode 100644
index 000000000000..d7d0b535f30a
--- /dev/null
+++ b/news/3 Code Health/5642.md	
@@ -0,0 +1,2 @@
+Update isort to version 4.3.20.
+(Thanks [Andrew Blakey](https://github.com/ablakey))
diff --git a/requirements.txt b/requirements.txt
index e5409eb79bbe..c9d3ecaf7423 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 jedi==0.12.0
 parso==0.2.1
-isort==4.3.17
+isort==4.3.20
 ptvsd==4.2.8