diff --git a/.editorconfig b/.editorconfig
index a541e47..7b01f6b 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -13,7 +13,7 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 indent_style = tab
 
-[*.yml]
+[*.{yml,json}]
 indent_style = space
 indent_size = 2
 
diff --git a/.gitignore b/.gitignore
index f81709a..ee2f24c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 .idea
 dist/
 node_modules
+/vendor/
+/*.zip
diff --git a/.travis.yml b/.travis.yml
index f6725de..486948d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -68,6 +68,7 @@ before_script:
           exit 1
           ;;
       esac
+    composer global require "yoast/phpunit-polyfills:^1.0"
     fi
   - |
     # Install PHP_CodeSniffer if it's requested for this test
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..a93c4c7
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,24 @@
+{
+  "name": "automattic/syntaxhighlighter",
+  "description": "Easily post syntax-highlighted code to your WordPress site without having to modify the code at all.",
+  "type": "wordpress-plugin",
+  "license": "GPL-2.0-or-later",
+  "require": {},
+  "archive": {
+    "exclude": [
+      "/*",
+      "!/dist",
+      "!/syntaxhighlighter2",
+      "!/syntaxhighlighter3",
+      "!/third-party-brushes",
+      "!/syntaxhighlighter_mce-4.js",
+      "!/syntaxhighlighter_mce.js",
+      "!/syntaxhighlighter.js",
+      "!/syntaxhighlighter.php",
+      "!/readme.txt",
+      ".DS_Store",
+      ".*",
+      "*.test.js"
+    ]
+  }
+}
diff --git a/package.json b/package.json
index 89f80ed..62e5867 100644
--- a/package.json
+++ b/package.json
@@ -1,31 +1,33 @@
 {
-	"name": "syntaxhighlighter",
-	"version": "3.6.0",
-	"description": "Easily post syntax-highlighted code to your WordPress site without having to modify the code at all.",
-	"homepage": "https://alex.blog/wordpress-plugins/syntaxhighlighter/",
-	"author": "Alex Mills (Viper007Bond)",
-	"license": "GPL-2.0-or-later",
-	"repository": {
-		"type": "git",
-		"url": "git+https://github.com/Viper007Bond/syntaxhighlighter.git"
-	},
-	"bugs": {
-		"url": "https://github.com/Viper007Bond/syntaxhighlighter/issues"
-	},
-	"scripts": {
-		"start": "cgb-scripts start",
-		"build": "cgb-scripts build",
-		"distclean": "rm -rf node_modules && rm -rf dist",
-		"preinstall": "npx npm-force-resolutions"
-	},
-	"dependencies": {
-		"@wordpress/escape-html": "1.9.0",
-		"cgb-scripts": "1.23.0",
-		"classnames": "2.2.6",
-		"lodash.unescape": "4.0.1",
-		"npm-force-resolutions": "0.0.3"
-	},
-	"resolutions": {
-		"mem": "4.0.0"
-	}
+  "name": "syntaxhighlighter",
+  "version": "3.6.0",
+  "description": "Easily post syntax-highlighted code to your WordPress site without having to modify the code at all.",
+  "homepage": "https://alex.blog/wordpress-plugins/syntaxhighlighter/",
+  "author": "Alex Mills (Viper007Bond)",
+  "license": "GPL-2.0-or-later",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Viper007Bond/syntaxhighlighter.git"
+  },
+  "bugs": {
+    "url": "https://github.com/Viper007Bond/syntaxhighlighter/issues"
+  },
+  "scripts": {
+    "start": "cgb-scripts start",
+    "build": "npm run build:assets && npm run archive",
+    "build:assets": "cgb-scripts build",
+    "distclean": "rm -rf node_modules && rm -rf dist",
+    "preinstall": "npx npm-force-resolutions",
+    "archive": "composer archive --file=$npm_package_name --format=zip"
+  },
+  "dependencies": {
+    "@wordpress/escape-html": "1.9.0",
+    "cgb-scripts": "1.23.0",
+    "classnames": "2.2.6",
+    "lodash.unescape": "4.0.1",
+    "npm-force-resolutions": "0.0.3"
+  },
+  "resolutions": {
+    "mem": "4.0.0"
+  }
 }