diff --git a/changelog.md b/changelog.md
index 8045c88..febe1ec 100644
--- a/changelog.md
+++ b/changelog.md
@@ -8,6 +8,8 @@
   * upgrade win_bison to version 3.7.4
   * upgrade m4 to version 1.4.18
   * upgrade gnulib
+  * removed VS2015 support
+  * fixed win_bison --update option (renaming opened file)
 
 ### version 2.5.23
   * upgrade win_bison to version 3.7.1
diff --git a/chocolatey/tools/chocolateyInstall.ps1 b/chocolatey/tools/chocolateyInstall.ps1
index 1ed8697..f161fe6 100644
--- a/chocolatey/tools/chocolateyInstall.ps1
+++ b/chocolatey/tools/chocolateyInstall.ps1
@@ -1,7 +1,7 @@
 # download and unpack a zip file
 Install-ChocolateyZipPackage `
   -PackageName "winflexbison3" `
-  -Url "https://github.com/lexxmark/winflexbison/releases/download/v2.5.23/win_flex_bison-2.5.23.zip" `
-  -Checksum "6AA5C8EA662DA1550020A5804C28BE63FFAA53486DA9F6842E24C379EC422DFC" `
+  -Url "https://github.com/lexxmark/winflexbison/releases/download/v2.5.24/win_flex_bison-2.5.24.zip" `
+  -Checksum "39C6086CE211D5415500ACC5ED2D8939861CA1696AEE48909C7F6DAF5122B505" `
   -ChecksumType "sha256" `
   -UnzipLocation "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
diff --git a/chocolatey/winflexbison3.nuspec b/chocolatey/winflexbison3.nuspec
index a079ffe..dee9acc 100644
--- a/chocolatey/winflexbison3.nuspec
+++ b/chocolatey/winflexbison3.nuspec
@@ -2,8 +2,8 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata>
     <id>winflexbison3</id>
-    <title>WinFlexBison (bison 3.7.1, flex 2.6.4)</title>
-    <version>2.5.23.20200904</version>
+    <title>WinFlexBison (bison 3.7.4, flex 2.6.4)</title>
+    <version>2.5.24.20210105</version>
     <authors>Alex Zhondin (in addition to original authors of flex and bison)</authors>
     <owners>lexxmark</owners>
     <summary>WinFlexBison is a port Flex/Bison tools to the Windows platform</summary>