diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2318ae4c7f..a0b08fc399 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -180,12 +180,19 @@ jobs:
     - name: Start PostgreSQL on Windows
       # see https://www.cybertec-postgresql.com/en/postgresql-github-actions-continuous-integration/
       run: |
+        echo $env:PGBIN >> $Env:GITHUB_PATH
         $pgService = Get-Service -Name postgresql*
         Set-Service -InputObject $pgService -Status running -StartupType automatic
         Start-Process -FilePath "$env:PGBIN\pg_isready" -Wait -PassThru
         $env:PGPASSWORD = 'root'
         & $env:PGBIN\createdb --owner=postgres eccube_db
-        echo $env:PGBIN >> $Env:GITHUB_PATH
+        & $env:PGBIN\psql -U postgres -c "SET password_encryption=md5;" postgres
+        & $env:PGBIN\psql -U postgres -c "ALTER role postgres with password 'root'" postgres
+        (Get-Content $env:PGDATA\postgresql.conf) | foreach { $_ -replace "scram-sha-256","md5" } | Set-Content $env:PGDATA\postgresql.conf
+        (Get-Content $env:PGDATA\pg_hba.conf) | foreach { $_ -replace "scram-sha-256","md5" } | Set-Content $env:PGDATA\pg_hba.conf
+        Restart-Service -InputObject $pgService -Force
+        Start-Process -FilePath "$env:PGBIN\pg_isready" -Wait -PassThru
+        & $env:PGBIN\psql -U postgres -c "select rolname,rolpassword from pg_authid;" postgres
 
     - name: Setup PHP
       uses: nanasess/setup-php@master