diff --git a/Cargo.lock b/Cargo.lock
index 60d6c18..e19323b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,7 +67,7 @@ checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
 
 [[package]]
 name = "as3_parser"
-version = "0.5.29"
+version = "1.0.0"
 dependencies = [
  "bitflags",
  "by_address",
diff --git a/crates/parser/Cargo.toml b/crates/parser/Cargo.toml
index de464ae..bf5913a 100644
--- a/crates/parser/Cargo.toml
+++ b/crates/parser/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "as3_parser"
-version = "0.5.29"
+version = "1.0.0"
 edition = "2021"
 authors = ["hydroper <matheusdiasdesouzads@gmail.com>"]
 repository = "https://github.com/hydroper/as3parser"
diff --git a/crates/parser/diagnostics/diagnostic_kind.rs b/crates/parser/diagnostics/diagnostic_kind.rs
index a56b218..baac4cb 100644
--- a/crates/parser/diagnostics/diagnostic_kind.rs
+++ b/crates/parser/diagnostics/diagnostic_kind.rs
@@ -50,8 +50,8 @@ pub enum DiagnosticKind {
     RedefiningXmlAttribute = 1070,
     InvalidXmlPi = 1071,
     XmlPiUnknownAttribute = 1072,
-    XmlPiVersionMustBe10 = 1073,
-    XmlPiEncodingMustBeUtf8 = 1074,
+    XmlPiVersion = 1073,
+    XmlPiEncoding = 1074,
     XmlMustConsistOfExactly1Element = 1075,
     XmlNameAtMostOneColon = 1076,
     UnexpectedCharacter = 1077,
diff --git a/crates/parser/diagnostics/diagnostics_english_resources.rs b/crates/parser/diagnostics/diagnostics_english_resources.rs
index ae24a31..b7eccc2 100644
--- a/crates/parser/diagnostics/diagnostics_english_resources.rs
+++ b/crates/parser/diagnostics/diagnostics_english_resources.rs
@@ -53,8 +53,8 @@ lazy_static! {
         DiagnosticKind::RedefiningXmlAttribute.id() => "Redefining attribute: '{1}'.".into(),
         DiagnosticKind::InvalidXmlPi.id() => "Invalid processing instruction.".into(),
         DiagnosticKind::XmlPiUnknownAttribute.id() => "Unknown attribute at processing instruction: '{1}'.".into(),
-        DiagnosticKind::XmlPiVersionMustBe10.id() => "XML version must be '1.0'.".into(),
-        DiagnosticKind::XmlPiEncodingMustBeUtf8.id() => "XML encoding must be 'utf-8'.".into(),
+        DiagnosticKind::XmlPiVersion.id() => "XML version must be '1.0'.".into(),
+        DiagnosticKind::XmlPiEncoding.id() => "XML encoding must be either 'utf-8' or 'utf-16'.".into(),
         DiagnosticKind::XmlMustConsistOfExactly1Element.id() => "Document must consist of exactly one element.".into(),
         DiagnosticKind::XmlNameAtMostOneColon.id() => "XML name may have at most one colon.".into(),
         DiagnosticKind::UnexpectedCharacter.id() => "Unexpected character. '{1}' is not allowed here".into(),
diff --git a/crates/parser/parser/css_parser.rs b/crates/parser/parser/css_parser.rs
index f0af633..d58394a 100644
--- a/crates/parser/parser/css_parser.rs
+++ b/crates/parser/parser/css_parser.rs
@@ -272,15 +272,17 @@ impl<'input> CssParser<'input> {
         }
         let mut rules: Vec<Rc<CssRule>> = vec![];
         self.expect(Token::BlockOpen);
-        while !(self.eof() || self.peek(Token::BlockClose)) {
-            if let Some(rule) = self.parse_opt_rule() {
-                rules.push(Rc::new(rule));
-            } else {
-                self.add_syntax_error(&self.token.1, DiagnosticKind::Unexpected, diagarg![self.token.0.clone()]);
-                self.next();
+        if !self.expecting_token_error {
+            while !(self.eof() || self.peek(Token::BlockClose)) {
+                if let Some(rule) = self.parse_opt_rule() {
+                    rules.push(Rc::new(rule));
+                } else {
+                    self.add_syntax_error(&self.token.1, DiagnosticKind::Unexpected, diagarg![self.token.0.clone()]);
+                    self.next();
+                }
             }
+            self.expect(Token::BlockClose);
         }
-        self.expect(Token::BlockClose);
         Rc::new(CssDirective::MediaQuery(CssMediaQuery {
             location: self.pop_location(),
             conditions,
@@ -293,14 +295,16 @@ impl<'input> CssParser<'input> {
         self.next();
         let mut properties: Vec<Rc<CssProperty>> = vec![];
         self.expect(Token::BlockOpen);
-        self.consume(Token::CssSemicolons);
-        while !(self.eof() || self.peek(Token::BlockClose)) {
-            properties.push(self.parse_property());
-            if !self.consume(Token::CssSemicolons) {
-                break;
+        if !self.expecting_token_error {
+            self.consume(Token::CssSemicolons);
+            while !(self.eof() || self.peek(Token::BlockClose)) {
+                properties.push(self.parse_property());
+                if !self.consume(Token::CssSemicolons) {
+                    break;
+                }
             }
+            self.expect(Token::BlockClose);
         }
-        self.expect(Token::BlockClose);
         Rc::new(CssDirective::FontFace(CssFontFace {
             location: self.pop_location(),
             properties,
@@ -376,14 +380,16 @@ impl<'input> CssParser<'input> {
         }
         let mut properties: Vec<Rc<CssProperty>> = vec![];
         self.expect(Token::BlockOpen);
-        self.consume(Token::CssSemicolons);
-        while !(self.eof() || self.peek(Token::BlockClose)) {
-            properties.push(self.parse_property());
-            if !self.consume(Token::CssSemicolons) {
-                break;
+        if !self.expecting_token_error {
+            self.consume(Token::CssSemicolons);
+            while !(self.eof() || self.peek(Token::BlockClose)) {
+                properties.push(self.parse_property());
+                if !self.consume(Token::CssSemicolons) {
+                    break;
+                }
             }
+            self.expect(Token::BlockClose);
         }
-        self.expect(Token::BlockClose);
         self.push_location(&selectors[0].location());
         Some(CssRule {
             location: self.pop_location(),
@@ -631,6 +637,10 @@ impl<'input> CssParser<'input> {
                     entries,
                 })));
             } else {
+                if self.peek(Token::ParenOpen) {
+                    self.add_syntax_error(&self.token_location(), DiagnosticKind::Unexpected, diagarg![self.token.0.clone()]);
+                    self.parse_arguments().unwrap();
+                }
                 base = Some(Rc::new(CssPropertyValue::Identifier(CssIdentifierPropertyValue {
                     location: self.pop_location(),
                     value: id.0,
diff --git a/crates/parser/parser/parser.rs b/crates/parser/parser/parser.rs
index 4246e82..c51bcfa 100644
--- a/crates/parser/parser/parser.rs
+++ b/crates/parser/parser/parser.rs
@@ -4834,7 +4834,7 @@ impl<'input> Parser<'input> {
     }
 
     /// Parses MXMLElement starting from its XMLTagContent.
-    fn parse_mxml_element(&mut self, start: Location, namespace: &Rc<MxmlNamespace>) -> MxmlElement {
+    fn parse_mxml_element(&mut self, start: Location, namespace: &Rc<MxmlNamespace>, encoding: &mut String) -> MxmlElement {
         self.push_location(&start);
         let namespace = Rc::new(MxmlNamespace::new(Some(namespace)));
         let name = self.parse_xml_name();
@@ -4876,7 +4876,7 @@ impl<'input> Parser<'input> {
 
         if !is_empty {
             self.expect_and_ie_xml_content(Token::Gt);
-            content = Some(self.parse_mxml_content(false, &namespace));
+            content = Some(self.parse_mxml_content(false, &namespace, encoding));
             self.non_greedy_expect_and_ie_xml_tag(Token::XmlLtSlash);
             let name = self.parse_xml_name();
             closing_name = Some(self.process_mxml_tag_name(name, &namespace));
@@ -5028,7 +5028,7 @@ impl<'input> Parser<'input> {
     }
 
     /// Parses XMLContent until either the `</` token or end-of-file.
-    fn parse_mxml_content(&mut self, until_eof: bool, namespace: &Rc<MxmlNamespace>) -> Vec<Rc<MxmlContent>> {
+    fn parse_mxml_content(&mut self, until_eof: bool, namespace: &Rc<MxmlNamespace>, encoding: &mut String) -> Vec<Rc<MxmlContent>> {
         let mut content = vec![];
         while if until_eof { self.tokenizer.characters().has_remaining() } else { !self.peek(Token::XmlLtSlash) } {
             if let Token::XmlMarkup(markup) = self.token.0.clone() {
@@ -5058,17 +5058,17 @@ impl<'input> Parser<'input> {
                     let i = location.first_offset() + 2 + name.len();
                     let j = decrease_last_offset(i, location.last_offset(), 2);
 
-                    let errors = process_xml_pi(self.compilation_unit(), (i, j), &name);
+                    let errors = process_xml_pi(self.compilation_unit(), (i, j), &name, encoding);
                     for error in errors.iter() {
                         match error {
                             XmlPiError::UnknownAttribute(name) => {
                                 self.add_syntax_error(&location, DiagnosticKind::XmlPiUnknownAttribute, diagarg![name.clone()]);
                             },
-                            XmlPiError::VersionMustBe10 => {
-                                self.add_syntax_error(&location, DiagnosticKind::XmlPiVersionMustBe10, vec![]);
+                            XmlPiError::Version => {
+                                self.add_syntax_error(&location, DiagnosticKind::XmlPiVersion, vec![]);
                             },
-                            XmlPiError::EncodingMustBeUtf8 => {
-                                self.add_syntax_error(&location, DiagnosticKind::XmlPiEncodingMustBeUtf8, vec![]);
+                            XmlPiError::Encoding => {
+                                self.add_syntax_error(&location, DiagnosticKind::XmlPiEncoding, vec![]);
                             },
                         }
                     }
@@ -5084,7 +5084,7 @@ impl<'input> Parser<'input> {
                 content.push(Rc::new(MxmlContent::Characters((unescape_xml(&text), location))));
             } else if self.consume_and_ie_xml_tag(Token::Lt) {
                 let start = self.token_location();
-                let element = self.parse_mxml_element(start, namespace);
+                let element = self.parse_mxml_element(start, namespace, encoding);
                 content.push(Rc::new(MxmlContent::Element(Rc::new(element))));
             } else if !until_eof {
                 self.expect_and_ie_xml_content(Token::XmlLtSlash);
@@ -5099,7 +5099,8 @@ impl<'input> Parser<'input> {
     fn parse_mxml(&mut self) -> Rc<Mxml> {
         self.mark_location();
         let ns = Rc::new(MxmlNamespace::new(None));
-        let mut content = self.parse_mxml_content(true, &ns);
+        let mut encoding = "utf-8".to_owned();
+        let mut content = self.parse_mxml_content(true, &ns, &mut encoding);
         self.filter_mxml_whitespace_out(&mut content);
 
         let mut element_count = 0usize;
@@ -5124,7 +5125,7 @@ impl<'input> Parser<'input> {
         Rc::new(Mxml {
             location,
             version: XmlVersion::Version10,
-            encoding: "utf-8".into(),
+            encoding,
             content,
         })
     }
@@ -5179,7 +5180,7 @@ fn join_asdoc_content(content: &Vec<(String, Location)>) -> (String, Location) {
     (s, location)
 }
 
-fn process_xml_pi(cu: &Rc<CompilationUnit>, byte_range: (usize, usize), name: &str) -> Vec<XmlPiError> {
+fn process_xml_pi(cu: &Rc<CompilationUnit>, byte_range: (usize, usize), name: &str, encoding: &mut String) -> Vec<XmlPiError> {
     if name != "xml" {
         return vec![];
     }
@@ -5199,12 +5200,15 @@ fn process_xml_pi(cu: &Rc<CompilationUnit>, byte_range: (usize, usize), name: &s
             match name.0.as_ref() {
                 "version" => {
                     if value.0 != "1.0" {
-                        errors.push(XmlPiError::VersionMustBe10);
+                        errors.push(XmlPiError::Version);
                     }
                 },
                 "encoding" => {
-                    if value.0.to_lowercase() != "utf-8" {
-                        errors.push(XmlPiError::EncodingMustBeUtf8);
+                    let v = value.0.to_lowercase();
+                    if ["utf-8", "utf-16"].contains(&v.as_str()) {
+                        *encoding = v;
+                    } else {
+                        errors.push(XmlPiError::Encoding);
                     }
                 },
                 _ => {
@@ -5225,8 +5229,8 @@ fn is_flex_documentable_meta_data(name: &str) -> bool {
 
 enum XmlPiError {
     UnknownAttribute(String),
-    VersionMustBe10,
-    EncodingMustBeUtf8,
+    Version,
+    Encoding,
 }
 
 struct ParserAsDocLine {
diff --git a/crates/parser_test/Cargo.toml b/crates/parser_test/Cargo.toml
index 0ffe8ff..fc873d6 100644
--- a/crates/parser_test/Cargo.toml
+++ b/crates/parser_test/Cargo.toml
@@ -17,7 +17,7 @@ path = "main.rs"
 [dependencies]
 clap = { version = "4.4.8", features = ["derive"] }
 file_paths = "1.0.0"
-as3_parser = { path = "../parser", version = "0.5" }
+as3_parser = { path = "../parser", version = "1.0" }
 maplit = "1.0.2"
 serde = { version = "1.0.192", features = ["rc", "derive"] }
 serde_json = "1.0.108"
diff --git a/demo/Cargo.toml b/demo/Cargo.toml
index 162625f..4c5f005 100644
--- a/demo/Cargo.toml
+++ b/demo/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-as3_parser = { path = "../crates/parser", version = "0.5" }
+as3_parser = { path = "../crates/parser", version = "1.0" }
 maplit = "1.0.2"
 serde = { version = "1.0.192", features = ["rc", "derive"] }
 serde_json = "1.0.108"
diff --git a/demo/dist/as3_parser_demo_bg.wasm b/demo/dist/as3_parser_demo_bg.wasm
index 18c1cf5..7bdc039 100644
Binary files a/demo/dist/as3_parser_demo_bg.wasm and b/demo/dist/as3_parser_demo_bg.wasm differ
diff --git a/docs/getting-started.md b/docs/getting-started.md
index 10bbc3b..d84514e 100644
--- a/docs/getting-started.md
+++ b/docs/getting-started.md
@@ -10,7 +10,7 @@ Install `as3_parser` in your Cargo project with `cargo add as3_parser`, or add t
 
 ```toml
 [dependencies]
-as3_parser = "0.5"
+as3_parser = "1.0"
 ```
 
 Parse programs or expressions through the `ParserFacade` structure of the `as3_parser` crate:
diff --git a/examples/asdoc/Cargo.toml b/examples/asdoc/Cargo.toml
index 203a1d3..8472705 100644
--- a/examples/asdoc/Cargo.toml
+++ b/examples/asdoc/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-as3_parser = { path = "../../crates/parser", version = "0.5" }
+as3_parser = { path = "../../crates/parser", version = "1.0" }
 
 [[example]]
 name = "asdoc"