diff --git a/smnp/token/tokenizer.py b/smnp/token/tokenizer.py
index a269b1d..cc96c14 100644
--- a/smnp/token/tokenizer.py
+++ b/smnp/token/tokenizer.py
@@ -3,7 +3,6 @@ from smnp.token.model import TokenList
 from smnp.token.tokenizers.assign import tokenizeAssign
 from smnp.token.tokenizers.asterisk import tokenizeAsterisk
 from smnp.token.tokenizers.bracket import tokenizeOpenBracket, tokenizeCloseBracket
-from smnp.token.tokenizers.colon import tokenizeColon
 from smnp.token.tokenizers.comma import tokenizeComma
 from smnp.token.tokenizers.comment import tokenizeComment
 from smnp.token.tokenizers.dot import tokenizeDot
@@ -17,6 +16,7 @@ from smnp.token.tokenizers.percent import tokenizePercent
 from smnp.token.tokenizers.ret import tokenizeReturn
 from smnp.token.tokenizers.square import tokenizeOpenSquare, tokenizeCloseSquare
 from smnp.token.tokenizers.string import tokenizeString
+from smnp.token.tokenizers.type import tokenizeType
 from smnp.token.tokenizers.whitespace import tokenizeWhitespaces
 from smnp.token.type import TokenType
 
@@ -25,7 +25,8 @@ tokenizers = (
     tokenizeCloseParen,
     tokenizeOpenSquare,
     tokenizeCloseSquare,
-    tokenizeAsterisk, 
+    tokenizeAsterisk,
+    tokenizeType,
     tokenizeString, 
     tokenizeFunction,
     tokenizeReturn,
@@ -36,7 +37,6 @@ tokenizers = (
     tokenizeOpenBracket,
     tokenizeCloseBracket,
     tokenizeAssign,
-    tokenizeColon,    
     tokenizePercent,
     tokenizeMinus,
     tokenizeDot,
diff --git a/smnp/token/tokenizers/colon.py b/smnp/token/tokenizers/colon.py
deleted file mode 100644
index 05a6571..0000000
--- a/smnp/token/tokenizers/colon.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from smnp.token.tools import tokenizeChar
-from smnp.token.type import TokenType
-
-def tokenizeColon(input, current, line):
-    return tokenizeChar(TokenType.COLON, ':', input, current, line)
diff --git a/smnp/token/tokenizers/note.py b/smnp/token/tokenizers/note.py
index 3d19976..b578b44 100644
--- a/smnp/token/tokenizers/note.py
+++ b/smnp/token/tokenizers/note.py
@@ -25,7 +25,7 @@ def tokenizeNote(input, current, line):
                 octave = input[current+consumedChars]
                 consumedChars += 1
                 
-            if current+consumedChars < len(input) and input[current+consumedChars] == '^':
+            if current+consumedChars < len(input) and input[current+consumedChars] == ':':
                 duration = ''
                 consumedChars += 1
                 while current+consumedChars < len(input) and re.match(r'\d', input[current+consumedChars]):
diff --git a/smnp/token/tokenizers/type.py b/smnp/token/tokenizers/type.py
new file mode 100644
index 0000000..a42f009
--- /dev/null
+++ b/smnp/token/tokenizers/type.py
@@ -0,0 +1,8 @@
+from smnp.token.tools import tokenizeKeywords
+from smnp.token.type import TokenType
+from smnp.type.model import Type
+
+
+def tokenizeType(input, current, line):
+    types = [ type.name.lower() for type in Type ]
+    return tokenizeKeywords(TokenType.TYPE, input, current, line, *types)
\ No newline at end of file
diff --git a/smnp/token/tools.py b/smnp/token/tools.py
index 9f4e902..e0ebc09 100644
--- a/smnp/token/tools.py
+++ b/smnp/token/tools.py
@@ -1,6 +1,8 @@
 import re
+
 from smnp.token.model import Token
 
+
 def tokenizeChar(type, char, input, current, line):
     if input[current] == char:
         return (1, Token(type, input[current], (line, current)))
@@ -15,6 +17,13 @@ def tokenizeRegexPattern(type, pattern, input, current, line):
         consumedChars += 1            
     return (consumedChars, Token(type, value, (line, current)) if consumedChars > 0 else None)
 
+def tokenizeKeywords(type, input, current, line, *keywords):
+    for keyword in keywords:
+        result = tokenizeKeyword(type, keyword, input, current, line)
+        if result[0] > 0:
+            return result
+    return (0, None)
+
 def tokenizeKeyword(type, keyword, input, current, line):       
     if len(input) >= current+len(keyword) and input[current:current+len(keyword)] == keyword:
         return (len(keyword), Token(type, keyword, (line, current)))
diff --git a/smnp/token/type.py b/smnp/token/type.py
index 746906f..cb691f5 100644
--- a/smnp/token/type.py
+++ b/smnp/token/type.py
@@ -1,23 +1,24 @@
-from enum import Enum
+from enum import Enum, auto
+
 
 class TokenType(Enum):
-    OPEN_PAREN = 1
-    CLOSE_PAREN = 2
-    ASTERISK = 3
-    STRING = 4
-    IDENTIFIER = 5
-    COMMA = 6
-    INTEGER = 7
-    OPEN_BRACKET = 8
-    CLOSE_BRACKET = 9
-    ASSIGN = 10
-    COLON = 11
-    NOTE = 12
-    COMMENT = 13
-    PERCENT = 14
-    MINUS = 15
-    FUNCTION = 16
-    RETURN = 17    
-    DOT = 18
-    OPEN_SQUARE = 19
-    CLOSE_SQUARE = 20
+    OPEN_PAREN = auto()
+    CLOSE_PAREN = auto()
+    ASTERISK = auto()
+    STRING = auto()
+    IDENTIFIER = auto()
+    COMMA = auto()
+    INTEGER = auto()
+    OPEN_BRACKET = auto()
+    CLOSE_BRACKET = auto()
+    ASSIGN = auto()
+    NOTE = auto()
+    COMMENT = auto()
+    PERCENT = auto()
+    MINUS = auto()
+    FUNCTION = auto()
+    RETURN = auto()
+    DOT = auto()
+    OPEN_SQUARE = auto()
+    CLOSE_SQUARE = auto()
+    TYPE = auto()