diff --git a/automatic/calibre/calibre.nuspec b/automatic/calibre/calibre.nuspec
index 836388d1266..8770ce0fb25 100644
--- a/automatic/calibre/calibre.nuspec
+++ b/automatic/calibre/calibre.nuspec
@@ -4,7 +4,7 @@
   <metadata>
     <id>calibre</id>
     <title>Calibre</title>
-    <version>7.20.0</version>
+    <version>7.21.0</version>
     <authors>Kovid Goyal</authors>
     <owners>chocolatey-community, gep13</owners>
     <summary>calibre is the one stop solution to all your e-book needs.</summary>
diff --git a/automatic/calibre/tools/chocolateyInstall.ps1 b/automatic/calibre/tools/chocolateyInstall.ps1
index 5b52db553e1..bc6df197e3c 100644
--- a/automatic/calibre/tools/chocolateyInstall.ps1
+++ b/automatic/calibre/tools/chocolateyInstall.ps1
@@ -5,8 +5,8 @@ $toolsPath = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
 $packageArgs = @{
   packageName    = $env:ChocolateyPackageName
   fileType       = 'MSI'
-  url64          = 'https://download.calibre-ebook.com/7.20.0/calibre-64bit-7.20.0.msi'
-  checksum64     = '47a88aaed5785f06d2d189c5f85282654ce221ccaf3bd7c96ef7b5d84f3eaf9e'
+  url64          = 'https://download.calibre-ebook.com/7.21.0/calibre-64bit-7.21.0.msi'
+  checksum64     = '70666e905359c683e9eaf38477b13eed508d8981536f827eb992c736b6341973'
   checksumType64 = 'sha256'
   softwareName   = 'calibre*'
   silentArgs     = '/quiet'