diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 21666d1..ff333f7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -18,7 +18,7 @@ repos:
         exclude: ^pyabc2/sources/_lzstring.py
 
   - repo: https://github.com/PyCQA/isort
-    rev: '8.0.1'
+    rev: '9.0.0a3'
     hooks:
       - id: isort
         exclude: ^pyabc2/sources/_lzstring.py