diff --git a/.github/workflows/openapi.yml b/.github/workflows/openapi.yml
index a28effc..18ca2e2 100644
--- a/.github/workflows/openapi.yml
+++ b/.github/workflows/openapi.yml
@@ -41,7 +41,7 @@ jobs:
             uses: "shivammathur/setup-php@v2"
             with:
                 php-version: "8.1"
-                tools: "php-cs-fixer:3.65.0"
+                tools: "php-cs-fixer:3.64.0"
                 coverage: "none"
         -
             name: "Determine OpenAPI CLI version"