diff --git a/iis-arr/iis-arr.nuspec b/iis-arr/iis-arr.nuspec
index 7b5d846..1027aae 100755
--- a/iis-arr/iis-arr.nuspec
+++ b/iis-arr/iis-arr.nuspec
@@ -4,7 +4,7 @@
   <metadata>
     <id>iis-arr</id>
     <title>IIS Application Request Routing (Install)</title>
-    <version>3.0.20210401</version>
+    <version>3.0.20210521</version>
     <authors>Microsoft Inc.</authors>
     <owners>bcc</owners>
     <summary>IIS Application Request Routing (ARR)</summary>
@@ -19,9 +19,9 @@
     <iconUrl>https://cdn.statically.io/gh/bcc/choco-packages/master/iis-arr/iis-arr.png</iconUrl>
     <dependencies>
       <dependency id="UrlRewrite" />
-      <dependency id="iis-externalcache" />
     </dependencies>
     <releaseNotes>
+* 3.0.20210521 - Version bump to remove no-longer-required iis-externalcache, switch to https URLs. 
 * 3.0.20210401 - Version and checksum bump with ARR MSI update from March 2021
 * 3.0.20180207 - Updated for the silent release from 3.0.1952 to 3.0.1988. Not currently clear on changes but the new MSIs have a valid MS code signature.
 * 3.0.20160107 - version bump for updated UrlRewrite dependency
diff --git a/iis-arr/tools/chocolateyinstall.ps1 b/iis-arr/tools/chocolateyinstall.ps1
index 2036964..225aa88 100755
--- a/iis-arr/tools/chocolateyinstall.ps1
+++ b/iis-arr/tools/chocolateyinstall.ps1
@@ -4,8 +4,8 @@ $ErrorActionPreference = 'Stop';
 
 $packageName= 'iis-arr'
 $toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
-$url        = 'http://download.microsoft.com/download/5/3/2/532630BE-7DCA-4352-984B-8D4EADBE5BEF/requestRouter_x86.msi'
-$url64      = 'http://download.microsoft.com/download/E/9/8/E9849D6A-020E-47E4-9FD0-A023E99B54EB/requestRouter_amd64.msi'
+$url        = 'https://download.microsoft.com/download/5/3/2/532630BE-7DCA-4352-984B-8D4EADBE5BEF/requestRouter_x86.msi'
+$url64      = 'https://download.microsoft.com/download/E/9/8/E9849D6A-020E-47E4-9FD0-A023E99B54EB/requestRouter_amd64.msi'
 
 $packageArgs = @{
   packageName   = $packageName