diff --git a/automatic/zerotier-one/legal/VERIFICATION.txt b/automatic/zerotier-one/legal/VERIFICATION.txt
index 0edc1da4f..c5f61ff64 100644
--- a/automatic/zerotier-one/legal/VERIFICATION.txt
+++ b/automatic/zerotier-one/legal/VERIFICATION.txt
@@ -6,13 +6,13 @@ The installer have been downloaded from their official download link listed on <
 and can be verified like this:
 
 1. Download the following installers:
-  32-Bit: <https://download.zerotier.com/RELEASES/1.6.6/dist/ZeroTier%20One.msi>
+  32-Bit: <https://download.zerotier.com/RELEASES/1.8.1/dist/ZeroTier%20One.msi>
 2. You can use one of the following methods to obtain the checksum
   - Use powershell function 'Get-Filehash'
   - Use chocolatey utility 'checksum.exe'
 
   checksum type: sha256
-  checksum32: 098C55C9477914F68D327073C0B58EF9FAE230FE6592FF60EAAA15765DD57683
+  checksum32: E3AA9B808350D6FCCA55DD609CA9E9A5ACB6F04F00C8DE5D27DC0FE5F9867792
 
 File 'LICENSE.txt' is obtained from <https://github.com/zerotier/ZeroTierOne/blob/master/COPYING>
 
diff --git a/automatic/zerotier-one/zerotier-one.nuspec b/automatic/zerotier-one/zerotier-one.nuspec
index b51e6ed55..b1888d907 100644
--- a/automatic/zerotier-one/zerotier-one.nuspec
+++ b/automatic/zerotier-one/zerotier-one.nuspec
@@ -26,7 +26,7 @@ This is a nuspec. It mostly adheres to https://docs.nuget.org/create/Nuspec-Refe
     <!-- version should MATCH as closely as possible with the underlying software -->
     <!-- Is the version a prerelease of a version? https://docs.nuget.org/create/versioning#creating-prerelease-packages -->
     <!-- Note that unstable versions like 0.0.1 can be considered a released version, but it's possible that one can release a 0.0.1-beta before you release a 0.0.1 version. If the version number is final, that is considered a released version and not a prerelease. -->
-    <version>1.6.6.20210924</version>
+    <version>1.8.1</version>
     <!-- owners is a poor name for maintainers of the package. It sticks around by this name for compatibility reasons. It basically means you. -->
     <owners>Maurice Kevenaar</owners>
     <!-- ============================== -->