diff --git a/parsers/parameters.js b/parsers/parameters.js
index 9eb2d5b..acc42fa 100644
--- a/parsers/parameters.js
+++ b/parsers/parameters.js
@@ -9,83 +9,61 @@ function quotedChar () {
 }
 
 function bit () {
-  return mona.join(
-    mona.value('digit'),
-    mona.digit(2)
-  )
+  return mona.digit(2)
 }
 
 function string () {
-  return mona.join(
-    mona.value('string'),
-    mona.between(
-      mona.string('"'),
-      mona.string('"'),
-      mona.text(quotedChar())
-    )
+  return mona.between(
+    mona.string('"'),
+    mona.string('"'),
+    mona.text(quotedChar())
   )
 }
 
 function hex () {
-  return mona.join(
-    mona.and(
-      mona.string('#$'),
-      mona.value('hex')
-    ),
-    mona.text(
-      mona.digit(16)
-    )
+  return mona.and(
+    mona.string('#$'),
+    mona.text(mona.digit(16))
   )
 }
 
 function binary () {
-  return mona.join(
-    mona.and(
-      mona.maybe(mona.string('#')),
-      mona.string('%'),
-      mona.value('binary')
-    ),
-    mona.text(
-      mona.digit(2)
-    )
+  return mona.and(
+    mona.maybe(mona.string('#')),
+    mona.string('%'),
+    mona.text(mona.digit(2))
   )
 }
 
 function address () {
-  return mona.join(
-    mona.and(
-      mona.string('$'),
-      mona.value('address')
-    ),
+  return mona.and(
+    mona.string('$'),
+    mona.text(mona.alphanum())
+  )
+}
+
+// this is the fallthrough parser
+function alphanum () {
+  return mona.and(
+    mona.not(bit()),
+    mona.not(address()),
+    mona.not(binary()),
+    mona.not(hex()),
+    mona.not(string()),
     mona.text(
       mona.alphanum()
     )
   )
 }
 
-// this is the fallthrough parser
-function alphanum () {
-  return mona.join(
-    mona.value('alphanum'),
-    mona.and(
-      mona.not(bit()),
-      mona.not(address()),
-      mona.not(binary()),
-      mona.not(bit()),
-      mona.not(string()),
-      mona.text(mona.alphanum())
-    )
-  )
-}
-
 function parameter () {
   return mona.or(
-    address(),
-    binary(),
-    hex(),
-    string(),
-    bit(),
-    alphanum()
+    mona.tag(address(), 'address'),
+    mona.tag(binary(), 'binary'),
+    mona.tag(hex(), 'hex'),
+    mona.tag(string(), 'string'),
+    mona.tag(bit(), 'bit'),
+    mona.tag(alphanum(), 'alphanum')
   )
 }
 
@@ -102,11 +80,5 @@ function parameters () {
 
 module.exports = {
   parameter,
-  parameters,
-  address,
-  binary,
-  hex,
-  string,
-  bit,
-  alphanum
+  parameters
 }
diff --git a/test/directive.js b/test/directive.js
index 96011dc..bef1308 100644
--- a/test/directive.js
+++ b/test/directive.js
@@ -6,10 +6,9 @@ tap.test('will parse a directive', (t) => {
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.inesprg 1'), {
     args: [
-      [
-        'digit',
-        '1'
-      ]
+      {
+        'bit': '1'
+      }
     ],
     directive: '.inesprg'
   })
@@ -19,10 +18,9 @@ tap.test('will parse a directive with direct address', (t) => {
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.inesprg $0000'), {
     args: [
-      [
-        'address',
-        '0000'
-      ]
+      {
+        'address': '0000'
+      }
     ],
     directive: '.inesprg'
   })
@@ -32,10 +30,9 @@ tap.test('will parse a directive with hex arg', (t) => {
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.inesprg #$FE'), {
     args: [
-      [
-        'hex',
-        'FE'
-      ]
+      {
+        'hex': 'FE'
+      }
     ],
     directive: '.inesprg'
   })
@@ -45,20 +42,18 @@ tap.test('will parse a directive with binary arg', (t) => {
   t.plan(2)
   t.deepEqual(mona.parse(directiveParser(), '.db %00010001'), {
     args: [
-      [
-        'binary',
-        '00010001'
-      ]
+      {
+        'binary': '00010001'
+      }
     ],
     directive: '.db'
   })
 
   t.deepEqual(mona.parse(directiveParser(), '.db #%00010001'), {
     args: [
-      [
-        'binary',
-        '00010001'
-      ]
+      {
+        'binary': '00010001'
+      }
     ],
     directive: '.db'
   })
@@ -68,18 +63,15 @@ tap.test('will parse a directive with multiple args', (t) => {
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.db %00010001,%00010001,%00010001'), {
     args: [
-      [
-        'binary',
-        '00010001'
-      ],
-      [
-        'binary',
-        '00010001'
-      ],
-      [
-        'binary',
-        '00010001'
-      ]
+      {
+        'binary': '00010001'
+      },
+      {
+        'binary': '00010001'
+      },
+      {
+        'binary': '00010001'
+      }
     ],
     directive: '.db'
   })
@@ -89,19 +81,15 @@ tap.test('will parse a directive with multiple args with spaces between them', (
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.db %00010001, %00010001, %00010001'), {
     args: [
-      [
-        'binary',
-        '00010001'
-      ],
-      [
-        'binary',
-        '00010001'
-      ],
-      [
-        'binary',
-        '00010001'
-      ]
-
+      {
+        'binary': '00010001'
+      },
+      {
+        'binary': '00010001'
+      },
+      {
+        'binary': '00010001'
+      }
     ],
     directive: '.db'
   })
@@ -111,10 +99,9 @@ tap.test('will parse a directive with string arg', (t) => {
   t.plan(1)
   t.deepEqual(mona.parse(directiveParser(), '.incbin "mario.chr"'), {
     args: [
-      [
-        'string',
-        'mario.chr'
-      ]
+      {
+        'string': 'mario.chr'
+      }
     ],
     directive: '.incbin'
   })
diff --git a/test/parameters.js b/test/parameters.js
index 93a4fa3..0784f31 100644
--- a/test/parameters.js
+++ b/test/parameters.js
@@ -5,52 +5,41 @@ const parsers = require('../parsers/parameters')
 tap.test('should parse direct memory address param', (t) => {
   t.plan(1)
   const input = '$C000'
-  t.deepEqual(mona.parse(parsers.address(), input), [
-    'address',
-    'C000'
-  ])
+  t.deepEqual(mona.parse(parsers.parameter(), input), {
+    'address': 'C000'
+  })
 })
 
 tap.test('should parse alphanum param', (t) => {
   t.plan(1)
   const input = 'background3'
-  t.deepEqual(mona.parse(parsers.alphanum(), input), [
-    'alphanum',
-    'background3'
-  ])
-})
-
-tap.test('should not parse alphanum param if empty', (t) => {
-  t.plan(1)
-  const input = ''
-  t.notOk(mona.parse(parsers.alphanum(), input))
+  t.deepEqual(mona.parse(parsers.parameter(), input), {
+    'alphanum': 'background3'
+  })
 })
 
 tap.test('should parse hex param', (t) => {
   t.plan(1)
   const input = '#$FF'
-  t.deepEqual(mona.parse(parsers.hex(), input), [
-    'hex',
-    'FF'
-  ])
+  t.deepEqual(mona.parse(parsers.parameter(), input), {
+    'hex': 'FF'
+  })
 })
 
 tap.test('should parse binary param', (t) => {
   t.plan(1)
   const input = '#%00000001'
-  t.deepEqual(mona.parse(parsers.binary(), input), [
-    'binary',
-    '00000001'
-  ])
+  t.deepEqual(mona.parse(parsers.parameter(), input), {
+    'binary': '00000001'
+  })
 })
 
 tap.test('should parse param', (t) => {
   t.plan(1)
   const input = '#%00000001'
-  t.deepEqual(mona.parse(parsers.parameter(), input), [
-    'binary',
-    '00000001'
-  ])
+  t.deepEqual(mona.parse(parsers.parameter(), input), {
+    'binary': '00000001'
+  })
 })
 
 tap.test('should parse multiple params', (t) => {
@@ -58,17 +47,14 @@ tap.test('should parse multiple params', (t) => {
 
   const input = '$24,$24,$24'
   t.deepEqual(mona.parse(parsers.parameters(), input), [
-    [
-      'address',
-      '24'
-    ],
-    [
-      'address',
-      '24'
-    ],
-    [
-      'address',
-      '24'
-    ]
+    {
+      'address': '24'
+    },
+    {
+      'address': '24'
+    },
+    {
+      'address': '24'
+    }
   ])
 })