diff --git a/Cargo.toml b/Cargo.toml
index 51aa8b7..873584b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,6 @@ opt-level = 0
 debug = true
 
 [dependencies]
-derivative = "2.2.0"
 serde = { version = "1.0", features = ["derive"] }
 
 #[target.'cfg(target_arch = "wasm32")'.dependencies]
diff --git a/src/document.rs b/src/document.rs
index 1ebd662..fd1524b 100644
--- a/src/document.rs
+++ b/src/document.rs
@@ -12,7 +12,7 @@ use crate::parser::{Parser, StyleBlock};
 // Interface to WASM to be used in JS
 #[wasm_bindgen]
 pub fn parse_rtf(rtf: String) -> RtfDocument {
-    return RtfDocument::try_from(rtf).unwrap()
+    return RtfDocument::try_from(rtf).unwrap();
 }
 
 #[derive(Debug, Default, Clone, PartialEq, Deserialize, Serialize)]
diff --git a/src/lexer.rs b/src/lexer.rs
index 208142c..4032b69 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -311,4 +311,4 @@ if (a == b) \{\
             [OpeningBracket, PlainText("je suis une b"), ControlSymbol((Unicode, Value(234))), PlainText("te"), ClosingBracket,]
         );
     }
-}
\ No newline at end of file
+}
diff --git a/src/paragraph.rs b/src/paragraph.rs
index 28fbe50..50a4383 100644
--- a/src/paragraph.rs
+++ b/src/paragraph.rs
@@ -1,5 +1,4 @@
 /// Define the paragraph related structs and enums
-
 use serde::{Deserialize, Serialize};
 use tsify::Tsify;
 use wasm_bindgen::prelude::wasm_bindgen;
diff --git a/src/parser.rs b/src/parser.rs
index 2eb10ee..577f5d5 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 use std::{fmt, mem};
 
-use derivative::Derivative;
 use serde::{Deserialize, Serialize};
 use wasm_bindgen::prelude::wasm_bindgen;
 
@@ -28,13 +27,11 @@ pub struct StyleBlock {
     pub text: String,
 }
 
-#[derive(Derivative, Debug, Clone, PartialEq, Hash, Deserialize, Serialize)]
-#[derivative(Default)]
+#[derive(Debug, Clone, PartialEq, Hash, Deserialize, Serialize)]
 #[wasm_bindgen]
 pub struct Painter {
     pub color_ref: ColorRef,
     pub font_ref: FontRef,
-    #[derivative(Default(value = "12"))]
     pub font_size: u16,
     pub bold: bool,
     pub italic: bool,
@@ -45,6 +42,23 @@ pub struct Painter {
     pub strike: bool,
 }
 
+impl Default for Painter {
+    fn default() -> Self {
+        Self {
+            color_ref: Default::default(),
+            font_ref: Default::default(),
+            font_size: 12,
+            bold: Default::default(),
+            italic: Default::default(),
+            underline: Default::default(),
+            superscript: Default::default(),
+            subscript: Default::default(),
+            smallcaps: Default::default(),
+            strike: Default::default(),
+        }
+    }
+}
+
 #[derive(Debug, Clone)]
 pub enum ParserError {
     InvalidToken(String),
@@ -78,15 +92,23 @@ impl fmt::Display for ParserError {
 }
 
 // This state keeps track of each value that depends on the scope nesting
-#[derive(Derivative, Debug, Clone, PartialEq, Hash)]
-#[derivative(Default)]
+#[derive(Debug, Clone, PartialEq, Hash)]
 struct ParserState {
     pub painter: Painter,
     pub paragraph: Paragraph,
-    #[derivative(Default(value = "1"))]
     pub unicode_ignore_count: i32,
 }
 
+impl Default for ParserState {
+    fn default() -> Self {
+        Self {
+            painter: Default::default(),
+            paragraph: Default::default(),
+            unicode_ignore_count: 1,
+        }
+    }
+}
+
 pub struct Parser<'a> {
     tokens: Vec<Token<'a>>,
     parsed_item: Vec<bool>,
@@ -129,7 +151,7 @@ impl<'a> Parser<'a> {
     pub fn parse(&mut self) -> Result<RtfDocument, ParserError> {
         self.check_document_validity()?;
         let mut document = RtfDocument::default(); // Init empty document
-        // Traverse the document and consume the header groups (FontTable, StyleSheet, etc ...)
+                                                   // Traverse the document and consume the header groups (FontTable, StyleSheet, etc ...)
         document.header = self.parse_header()?;
         // Init the state of the docuement. the stack is used to keep track of the different scope changes.
         let mut state_stack: Vec<ParserState> = vec![ParserState::default()];
@@ -748,4 +770,4 @@ pub mod tests {
         assert_eq!(doc1.body, doc2.body);
         assert_eq!(doc3.body, doc2.body);
     }
-}
\ No newline at end of file
+}
diff --git a/src/tokens.rs b/src/tokens.rs
index 3d673df..0307c15 100644
--- a/src/tokens.rs
+++ b/src/tokens.rs
@@ -245,4 +245,4 @@ mod tests {
         let input = r"\rtf-1";
         assert_eq!(ControlWord::from(input).unwrap(), (ControlWord::Rtf, Property::Value(-1)))
     }
-}
\ No newline at end of file
+}