diff --git a/examples/SyntaxHighlighter/include/highlighter.h b/examples/SyntaxHighlighter/include/highlighter.h
index 2646c1f..0e3bd39 100644
--- a/examples/SyntaxHighlighter/include/highlighter.h
+++ b/examples/SyntaxHighlighter/include/highlighter.h
@@ -22,6 +22,7 @@ class Highlighter {
         void process();
         
         enum TokenType {
+            COMMENT,
             TAG,
             CONTENT,
             ELEMENT,
diff --git a/examples/SyntaxHighlighter/src/attributelexer.lxs b/examples/SyntaxHighlighter/src/attributelexer.lxs
index cb83d91..3bdc00f 100644
--- a/examples/SyntaxHighlighter/src/attributelexer.lxs
+++ b/examples/SyntaxHighlighter/src/attributelexer.lxs
@@ -1,6 +1,6 @@
-ELEMENT = </?[     ]*[a-zA-Z0-9]*
+ELEMENT = </?[     ]*[a-zA-Z0-9-]*
 WHITESPACE = [  ]*
-ATTRIBUTE = [a-zA-Z0-9]*[   ]*=
-ATTRIBUTE_CONTENT_DOUBLE_QUOTES = [ ]*"[^<>"]*"
-ATTRIBUTE_CONTENT_SINGLE_QUOTES = [ ]*'[^<>']*'
+ATTRIBUTE = [a-zA-Z0-9-]*[   ]*=
+ATTRIBUTE_CONTENT_DOUBLE_QUOTES = "[^<>"]*"
+ATTRIBUTE_CONTENT_SINGLE_QUOTES = '[^<>']*'
 BRACKET = [</>]
diff --git a/examples/SyntaxHighlighter/src/highlighter.cpp b/examples/SyntaxHighlighter/src/highlighter.cpp
index 2003e4d..cac778a 100644
--- a/examples/SyntaxHighlighter/src/highlighter.cpp
+++ b/examples/SyntaxHighlighter/src/highlighter.cpp
@@ -11,6 +11,7 @@ Highlighter::Highlighter(std::istream &file) {
     colormap[ATTRIBURE_CONTENT] = Undefined;
     colormap[BRACKET] = Undefined;
     colormap[nonmatching] = Undefined;
+    colormap[COMMENT] = Undefined;
 }
 
 Highlighter::~Highlighter() {
@@ -30,6 +31,9 @@ void Highlighter::process() {
                 case XMLLexer::TokenType::TAG: 
                     newtoken.type = TAG;
                     break;
+                case XMLLexer::TokenType::COMMENT: 
+                    newtoken.type = COMMENT;
+                    break;
                 default: 
                     newtoken.type = nonmatching;
                     break;
@@ -103,6 +107,7 @@ ConsoleHighlighter::ConsoleHighlighter(std::istream &file): Highlighter(file) {
     colormap[ATTRIBURE_CONTENT] = Green;
     colormap[BRACKET] = Blue;
     colormap[nonmatching] = Black;
+    colormap[COMMENT] = Black;
     process();
 }
 
diff --git a/examples/SyntaxHighlighter/src/xmllexer.lxs b/examples/SyntaxHighlighter/src/xmllexer.lxs
index 8acd753..03a5eab 100644
--- a/examples/SyntaxHighlighter/src/xmllexer.lxs
+++ b/examples/SyntaxHighlighter/src/xmllexer.lxs
@@ -1,2 +1,3 @@
+COMMENT = <!--[^<>]*-->
 TAG = </?[^<>]*>
 CONTENT = [^<>]*