diff --git a/.github/workflows/build-2.x.yml b/.github/workflows/build-2.x.yml
index 3bead792..a5c6e0cd 100644
--- a/.github/workflows/build-2.x.yml
+++ b/.github/workflows/build-2.x.yml
@@ -95,7 +95,7 @@ jobs:
           cd $DRUPAL_DIR
           composer config repositories.local path "$GITHUB_WORKSPACE/build_dir"
           composer config minimum-stability dev
-          composer config prefer-stable
+          composer config prefer-stable true
           composer require "islandora/islandora:dev-github-testing as dev-2.x"
 
       - name: Install modules