diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6069c42..df3cf5d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [6.1.0] - 2020-11-04
+
+### Changed
+
+  - Upgrade mkcert to version 1.4.2.
+  - Include separate mkcert arm64 build.
+
 ## [6.0.0] - 2020-11-03
 
 ### Changed
diff --git a/lib/mkcertBinaryForThisMachine.js b/lib/mkcertBinaryForThisMachine.js
index 5f26b76..bb8c1d2 100644
--- a/lib/mkcertBinaryForThisMachine.js
+++ b/lib/mkcertBinaryForThisMachine.js
@@ -20,7 +20,7 @@ function mkcertBinaryForThisMachine (settingsPath) {
 
   const architectureMap = {
     arm: 'arm',
-    arm64: 'arm',
+    arm64: 'arm64',
     x64: 'amd64'
   }
 
@@ -30,7 +30,7 @@ function mkcertBinaryForThisMachine (settingsPath) {
   if (platform === undefined) throw new Error('Unsupported platform', os.platform())
   if (architecture === undefined) throw new Error('Unsupported architecture', os.arch())
 
-  const mkcertVersion = '1.4.1'
+  const mkcertVersion = '1.4.2'
 
   const mkcertBinaryName = `mkcert-v${mkcertVersion}-${platform}-${architecture}`
   const mkcertBinaryRelativePath = path.join('..', 'mkcert-bin', mkcertBinaryName)
diff --git a/mkcert-bin/mkcert-v1.4.1-darwin-amd64 b/mkcert-bin/mkcert-v1.4.1-darwin-amd64
deleted file mode 100644
index bb3ed01..0000000
Binary files a/mkcert-bin/mkcert-v1.4.1-darwin-amd64 and /dev/null differ
diff --git a/mkcert-bin/mkcert-v1.4.1-linux-amd64 b/mkcert-bin/mkcert-v1.4.1-linux-amd64
deleted file mode 100644
index c8dfec2..0000000
Binary files a/mkcert-bin/mkcert-v1.4.1-linux-amd64 and /dev/null differ
diff --git a/mkcert-bin/mkcert-v1.4.1-linux-arm b/mkcert-bin/mkcert-v1.4.1-linux-arm
deleted file mode 100644
index 9c98df0..0000000
Binary files a/mkcert-bin/mkcert-v1.4.1-linux-arm and /dev/null differ
diff --git a/mkcert-bin/mkcert-v1.4.1-windows-amd64.exe b/mkcert-bin/mkcert-v1.4.1-windows-amd64.exe
deleted file mode 100644
index e3dbc9f..0000000
Binary files a/mkcert-bin/mkcert-v1.4.1-windows-amd64.exe and /dev/null differ
diff --git a/mkcert-bin/mkcert-v1.4.2-darwin-amd64 b/mkcert-bin/mkcert-v1.4.2-darwin-amd64
new file mode 100644
index 0000000..b5761f1
Binary files /dev/null and b/mkcert-bin/mkcert-v1.4.2-darwin-amd64 differ
diff --git a/mkcert-bin/mkcert-v1.4.2-linux-amd64 b/mkcert-bin/mkcert-v1.4.2-linux-amd64
new file mode 100644
index 0000000..02f36e8
Binary files /dev/null and b/mkcert-bin/mkcert-v1.4.2-linux-amd64 differ
diff --git a/mkcert-bin/mkcert-v1.4.2-linux-arm b/mkcert-bin/mkcert-v1.4.2-linux-arm
new file mode 100644
index 0000000..ccd6ab8
Binary files /dev/null and b/mkcert-bin/mkcert-v1.4.2-linux-arm differ
diff --git a/mkcert-bin/mkcert-v1.4.2-linux-arm64 b/mkcert-bin/mkcert-v1.4.2-linux-arm64
new file mode 100644
index 0000000..46243df
Binary files /dev/null and b/mkcert-bin/mkcert-v1.4.2-linux-arm64 differ
diff --git a/mkcert-bin/mkcert-v1.4.2-windows-amd64.exe b/mkcert-bin/mkcert-v1.4.2-windows-amd64.exe
new file mode 100644
index 0000000..9a01830
Binary files /dev/null and b/mkcert-bin/mkcert-v1.4.2-windows-amd64.exe differ
diff --git a/package.json b/package.json
index 8637a4e..822ca78 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@small-tech/auto-encrypt-localhost",
-  "version": "6.0.0",
+  "version": "6.1.0",
   "description": "Automatically provisions and installs locally-trusted TLS certificates for Node.js https servers (including Express.js, etc.) using mkcert.",
   "keywords": [
     "mkcert",