diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 21d83b1f..52689191 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -83,7 +83,7 @@ jobs:
         run: bin/rake test:unit
 
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v5
+        uses: aws-actions/configure-aws-credentials@v6
         with:
           role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
           role-session-name: pg-aws_rds_iam-ci-${{ github.run_id }}-${{ github.run_attempt }}-${{ strategy.job-index }}
diff --git a/.ruby-version b/.ruby-version
index 7921bd0c..1454f6ed 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.4.8
+4.0.1