diff --git a/package-lock.json b/package-lock.json
index 2f2c70df838be1..44064a0e60140d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2562,7 +2562,10 @@
 			}
 		},
 		"@wordpress/block-serialization-spec-parser": {
-			"version": "file:packages/block-serialization-spec-parser"
+			"version": "file:packages/block-serialization-spec-parser",
+			"requires": {
+				"pegjs": "^0.10.0"
+			}
 		},
 		"@wordpress/blocks": {
 			"version": "file:packages/blocks",
@@ -15873,8 +15876,7 @@
 		"pegjs": {
 			"version": "0.10.0",
 			"resolved": "https://registry.npmjs.org/pegjs/-/pegjs-0.10.0.tgz",
-			"integrity": "sha1-z4uvrm7d/0tafvsYUmnqr0YQ3b0=",
-			"dev": true
+			"integrity": "sha1-z4uvrm7d/0tafvsYUmnqr0YQ3b0="
 		},
 		"pend": {
 			"version": "1.2.0",
diff --git a/packages/block-serialization-default-parser/test/index.js b/packages/block-serialization-default-parser/test/index.js
index a3c67e280ef946..72f4121ce19445 100644
--- a/packages/block-serialization-default-parser/test/index.js
+++ b/packages/block-serialization-default-parser/test/index.js
@@ -6,7 +6,8 @@ import path from 'path';
 /**
  * WordPress dependencies
  */
-import { jsTester, phpTester } from '@wordpress/block-serialization-spec-parser';
+// eslint-disable-next-line no-restricted-syntax
+import { jsTester, phpTester } from '@wordpress/block-serialization-spec-parser/shared-tests';
 
 /**
  * Internal dependencies
diff --git a/packages/block-serialization-spec-parser/CHANGELOG.md b/packages/block-serialization-spec-parser/CHANGELOG.md
index e4f403ffd68497..7ba44f0cd9a963 100644
--- a/packages/block-serialization-spec-parser/CHANGELOG.md
+++ b/packages/block-serialization-spec-parser/CHANGELOG.md
@@ -1,6 +1,12 @@
-## 2.1.0 (Unreleased)
+## 3.0.0 (Unreleased)
 
-- A `parser.php` file generated from the PEGJS grammar is now included.
+## Breaking Change
+
+- A `parser.js` file generated from the PEGJS grammar is now outputted in commonjs format.
+
+## New Feature
+
+- A `parser.php` file generated from the PEGJS grammar is now added upon installation.
 
 ## 2.0.2 (2018-12-12)
 
diff --git a/packages/block-serialization-spec-parser/index.js b/packages/block-serialization-spec-parser/index.js
deleted file mode 100644
index b217f8f5c5ad76..00000000000000
--- a/packages/block-serialization-spec-parser/index.js
+++ /dev/null
@@ -1,2 +0,0 @@
-export { parse } from './parser';
-export { jsTester, phpTester } from './shared-tests';
diff --git a/packages/block-serialization-spec-parser/package.json b/packages/block-serialization-spec-parser/package.json
index 918c269169f09f..5d40a8cfd03de1 100644
--- a/packages/block-serialization-spec-parser/package.json
+++ b/packages/block-serialization-spec-parser/package.json
@@ -18,12 +18,16 @@
 	"bugs": {
 		"url": "https://github.com/WordPress/gutenberg/issues"
 	},
+	"main": "parser.js",
+	"dependencies": {
+		"pegjs": "^0.10.0"
+	},
 	"publishConfig": {
 		"access": "public"
 	},
 	"scripts": {
 		"build": "concurrently \"npm run build:js\" \"npm run build:php\"",
-		"build:js": "pegjs --format umd -o ./parser.js ./grammar.pegjs",
+		"build:js": "pegjs --format commonjs -o ./parser.js ./grammar.pegjs",
 		"build:php": "node bin/create-php-parser.js"
 	}
 }
diff --git a/packages/block-serialization-spec-parser/test/index.js b/packages/block-serialization-spec-parser/test/index.js
index 7bdbe9f053f169..9d00c5a5434c33 100644
--- a/packages/block-serialization-spec-parser/test/index.js
+++ b/packages/block-serialization-spec-parser/test/index.js
@@ -6,7 +6,8 @@ import path from 'path';
 /**
  * Internal dependencies
  */
-import { jsTester, phpTester, parse } from '../';
+import { parse } from '../';
+import { jsTester, phpTester } from '../shared-tests';
 
 describe( 'block-serialization-spec-parser-js', jsTester( parse ) );
 
diff --git a/packages/scripts/config/webpack.config.js b/packages/scripts/config/webpack.config.js
index 5dcaebe8a3770b..c92575423fec19 100644
--- a/packages/scripts/config/webpack.config.js
+++ b/packages/scripts/config/webpack.config.js
@@ -83,11 +83,7 @@ const config = {
 			},
 			{
 				test: /\.js$/,
-				exclude: [
-					/block-serialization-spec-parser/,
-					/is-shallow-equal/,
-					/node_modules/,
-				],
+				exclude: /node_modules/,
 				use: require.resolve( 'babel-loader' ),
 			},
 		],