diff --git a/.github/workflows/images_build_rhel.yml b/.github/workflows/images_build_rhel.yml
index 6419f7506..69b3e4fde 100644
--- a/.github/workflows/images_build_rhel.yml
+++ b/.github/workflows/images_build_rhel.yml
@@ -259,7 +259,7 @@ jobs:
               --env PFLT_DOCKERCONFIG=/temp-authfile.json \
               -v $PFLT_ARTIFACTS:/artifacts \
               -v $PFLT_DOCKERCONFIG:/temp-authfile.json:ro \
-              quay.io/opdev/preflight:stable check container ${{ steps.build_image.outputs.image-with-tag }} --submit
+              quay.io/opdev/preflight:1.5.1 check container ${{ steps.build_image.outputs.image-with-tag }} --submit
 
       - name: Push to RedHat certification procedure
         id: push_to_registry_all_tags
diff --git a/Dockerfiles/build-base/windows/Dockerfile.agent2 b/Dockerfiles/build-base/windows/Dockerfile.agent2
index c5ec63b47..9f236cd34 100644
--- a/Dockerfiles/build-base/windows/Dockerfile.agent2
+++ b/Dockerfiles/build-base/windows/Dockerfile.agent2
@@ -200,7 +200,7 @@ RUN Set-Location -Path $env:SystemDrive\.; `
     [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; `
     (New-Object Net.WebClient).DownloadFile("""$env:CYGWIN_URL""", """$env:SystemDrive\setup.exe"""); `
     `
-    $sha256 = 'edd0a64dc65087ffe453ca94b267169b39458a983b29ac31320fcaa983d0f97e'; `
+    $sha256 = '6bad4555154b3b348d1bfb633a2e9d6086aa46e36952f456a434ecef5b0010e0'; `
     Write-Host ('Verifying SHA256 ({0}) ...' -f $sha256); `
     if ((Get-FileHash $env:SystemDrive\setup.exe -Algorithm sha256).Hash -ne $sha256) { `
         Write-Host 'Checksum Cygwin failed!'; `