diff --git a/.github/workflows/create-release-artifacts.yaml b/.github/workflows/create-release-artifacts.yaml
index e15c907a..ed4c9543 100644
--- a/.github/workflows/create-release-artifacts.yaml
+++ b/.github/workflows/create-release-artifacts.yaml
@@ -32,9 +32,9 @@ jobs:
             Write-Host "libpng SHA256 mismatch! ($hash)"
             exit 1
           }
-          $wc.DownloadFile('https://github.com/lexxmark/winflexbison/releases/download/v2.5.23/win_flex_bison-2.5.23.zip', 'winflexbison.zip')
+          $wc.DownloadFile('https://github.com/lexxmark/winflexbison/releases/download/v2.5.24/win_flex_bison-2.5.24.zip', 'winflexbison.zip')
           $hash = (Get-FileHash "winflexbison.zip" -Algorithm SHA256).Hash
-          if ($hash -ne '6AA5C8EA662DA1550020A5804C28BE63FFAA53486DA9F6842E24C379EC422DFC') {
+          if ($hash -ne '39c6086ce211d5415500acc5ed2d8939861ca1696aee48909c7f6daf5122b505') {
             Write-Host "bison SHA256 mismatch! ($hash)"
           }
           Expand-Archive -DestinationPath .           "zlib.zip"
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 997b3567..6eb4298f 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -88,9 +88,9 @@ jobs:
             Write-Host "libpng SHA256 mismatch! ($hash)"
             exit 1
           }
-          $wc.DownloadFile('https://github.com/lexxmark/winflexbison/releases/download/v2.5.23/win_flex_bison-2.5.23.zip', 'winflexbison.zip')
+          $wc.DownloadFile('https://github.com/lexxmark/winflexbison/releases/download/v2.5.24/win_flex_bison-2.5.24.zip', 'winflexbison.zip')
           $hash = (Get-FileHash "winflexbison.zip" -Algorithm SHA256).Hash
-          if ($hash -ne '6AA5C8EA662DA1550020A5804C28BE63FFAA53486DA9F6842E24C379EC422DFC') {
+          if ($hash -ne '39c6086ce211d5415500acc5ed2d8939861ca1696aee48909c7f6daf5122b505') {
             Write-Host "bison SHA256 mismatch! ($hash)"
           }
           Expand-Archive -DestinationPath .           "zlib.zip"