diff --git a/src/push/state.rs b/src/push/state.rs
index 78b0596..0b09171 100644
--- a/src/push/state.rs
+++ b/src/push/state.rs
@@ -8,12 +8,12 @@ use rust_decimal::prelude::*;
 pub struct PushState {
     pub int: Vec<i128>,
     pub float: Vec<Decimal>,
-    pub string: Vec<Vec<u8>>,
+    pub string: Vec<Vec<char>>,
     pub boolean: Vec<bool>,
     pub char: Vec<char>,
     pub vector_int: Vec<Vec<i128>>,
     pub vector_float: Vec<Vec<Decimal>>,
-    pub vector_string: Vec<Vec<Vec<u8>>>,
+    pub vector_string: Vec<Vec<Vec<char>>>,
     pub vector_boolean: Vec<Vec<bool>>,
     pub vector_char: Vec<Vec<char>>,
     pub exec: Vec<Gene>,
@@ -40,12 +40,12 @@ pub enum Gene {
     GeneInt(i128),
     GeneFloat(Decimal),
     GeneBoolean(bool),
-    GeneString(Vec<u8>),
+    GeneString(Vec<char>),
     GeneChar(char),
     GeneVectorInt(Vec<i128>),
     GeneVectorFloat(Vec<Decimal>),
     GeneVectorBoolean(Vec<bool>),
-    GeneVectorString(Vec<Vec<u8>>),
+    GeneVectorString(Vec<Vec<char>>),
     GeneVectorChar(Vec<char>),
     StateFunc(fn(&mut PushState)),
     Close,