diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ea7ca7e7..0d413cd4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/psf/black
-    rev: 21.8b0
+    rev: 21.9b0
     hooks:
     -   id: black
         args: [--safe, --quiet, --target-version, py35]