diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bfb261c..577f980 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,7 +19,7 @@ repos:
       - id: trailing-whitespace
 
   - repo: https://github.com/adamchainz/blacken-docs
-    rev: 78a9dcbecf4f755f65d1f3dec556bc249d723600 # frozen: 1.19.1
+    rev: dda8db18cfc68df532abf33b185ecd12d5b7b326 # frozen: 1.20.0
     hooks:
       - id: blacken-docs