diff --git a/.github/workflows/unused.yml b/.github/workflows/unused.yml
index baec23af2..fff8ee3e4 100644
--- a/.github/workflows/unused.yml
+++ b/.github/workflows/unused.yml
@@ -30,7 +30,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: '8.0'
-          tools: composer, composer-unused
+          tools: composer, composer-unused:0.8.5
           extensions: intl, json, mbstring, xml
           coverage: none
         env: