diff --git a/src/roxy.rs b/src/roxy.rs
index 496d010..80dc942 100644
--- a/src/roxy.rs
+++ b/src/roxy.rs
@@ -12,21 +12,21 @@ pub trait AndThenParser<P> {
     fn and_then(&mut self, parser: P) -> &Self;
 }
 
-pub struct Parser {
-    steps: Vec<Box<dyn Parse>>,
+pub struct Parser<'a> {
+    steps: Vec<&'a mut dyn Parse>,
 }
 
-impl Parser {
+impl<'a> Parser<'a> {
     pub fn new() -> Self {
         Parser { steps: Vec::new() }
     }
 
-    pub fn push<P: Parse + 'static>(&mut self, parser: P) {
-        self.steps.push(Box::new(parser));
+    pub fn push<P: Parse>(&mut self, parser: &'a mut P)  {
+        self.steps.push(parser);
     }
 }
 
-impl Parse for Parser {
+impl<'a> Parse for Parser<'a> {
     fn parse(&mut self, path: &str, src: &[u8], dst: &mut Vec<u8>) -> std::io::Result<()> {
         let mut buf_1 = Vec::from(src);
         let mut buf_2 = Vec::from(dst.as_slice());