diff --git a/Cargo.lock b/Cargo.lock
index 48b2d81..282e323 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -783,8 +783,9 @@ dependencies = [
 
 [[package]]
 name = "pyroncalc"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
+ "bitcode",
  "ironcalc",
  "pyo3",
  "serde",
diff --git a/bindings/python/Cargo.toml b/bindings/python/Cargo.toml
index 21eefa2..1531256 100644
--- a/bindings/python/Cargo.toml
+++ b/bindings/python/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyroncalc"
-version = "0.5.2"
+version = "0.5.3"
 edition = "2021"
 
 
@@ -14,6 +14,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 xlsx = { package= "ironcalc", path = "../../xlsx", version = "0.5.0" }
 pyo3 = { version = "0.25", features = ["extension-module"] }
+bitcode = "0.6.3"
 
 
 [features]
diff --git a/bindings/python/pyproject.toml b/bindings/python/pyproject.toml
index d652e63..8774fdc 100644
--- a/bindings/python/pyproject.toml
+++ b/bindings/python/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "ironcalc"
-version = "0.5.2"
+version = "0.5.3"
 description = "Create, edit and evaluate Excel spreadsheets"
 requires-python = ">=3.10"
 keywords = [
diff --git a/bindings/python/src/lib.rs b/bindings/python/src/lib.rs
index 4a188c2..b6eaa45 100644
--- a/bindings/python/src/lib.rs
+++ b/bindings/python/src/lib.rs
@@ -2,7 +2,7 @@ use pyo3::exceptions::PyException;
 use pyo3::{create_exception, prelude::*, wrap_pyfunction};
 
 use types::{PySheetProperty, PyStyle};
-use xlsx::base::types::Style;
+use xlsx::base::types::{Style, Workbook};
 use xlsx::base::{Model, UserModel};
 
 use xlsx::export::{save_to_icalc, save_to_xlsx};
@@ -81,6 +81,12 @@ impl PyModel {
         save_to_icalc(&self.model, file).map_err(|e| WorkbookError::new_err(e.to_string()))
     }
 
+    /// To bytes
+    pub fn to_bytes(&self) -> PyResult<Vec<u8>> {
+        let bytes = self.model.to_bytes();
+        Ok(bytes)
+    }
+
     /// Evaluates the workbook
     pub fn evaluate(&mut self) {
         self.model.evaluate()
@@ -298,6 +304,15 @@ pub fn load_from_icalc(file_name: &str) -> PyResult<PyModel> {
     Ok(PyModel { model })
 }
 
+#[pyfunction]
+pub fn load_from_bytes(bytes: &[u8]) -> PyResult<PyModel> {
+    let workbook: Workbook =
+        bitcode::decode(bytes).map_err(|e| WorkbookError::new_err(e.to_string()))?;
+    let model =
+        Model::from_workbook(workbook).map_err(|e| WorkbookError::new_err(e.to_string()))?;
+    Ok(PyModel { model })
+}
+
 /// Creates an empty model
 #[pyfunction]
 pub fn create(name: &str, locale: &str, tz: &str) -> PyResult<PyModel> {
@@ -348,6 +363,7 @@ fn ironcalc(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_function(wrap_pyfunction!(create, m)?)?;
     m.add_function(wrap_pyfunction!(load_from_xlsx, m)?)?;
     m.add_function(wrap_pyfunction!(load_from_icalc, m)?)?;
+    m.add_function(wrap_pyfunction!(load_from_bytes, m)?)?;
     m.add_function(wrap_pyfunction!(test_panic, m)?)?;
 
     // User model functions
diff --git a/bindings/python/tests/test_create.py b/bindings/python/tests/test_create.py
index 02e5048..ca029e5 100644
--- a/bindings/python/tests/test_create.py
+++ b/bindings/python/tests/test_create.py
@@ -7,6 +7,12 @@ def test_simple():
 
     assert model.get_formatted_cell_value(0, 1, 1) == "3"
 
+    bytes = model.to_bytes()
+
+    model2 = ic.load_from_bytes(bytes)
+    assert model2.get_formatted_cell_value(0, 1, 1) == "3"
+
+
 def test_simple_user():
     model = ic.create_user_model("model", "en", "UTC")
     model.set_user_input(0, 1, 1, "=1+2")
@@ -20,4 +26,4 @@ def test_simple_user():
     model2 = ic.create_user_model("model", "en", "UTC")
     model2.apply_external_diffs(diffs)
     assert model2.get_formatted_cell_value(0, 1, 1) == "3"
-    assert model2.get_formatted_cell_value(0, 1, 2) == "6"
\ No newline at end of file
+    assert model2.get_formatted_cell_value(0, 1, 2) == "6"
diff --git a/webapp/IronCalc/package-lock.json b/webapp/IronCalc/package-lock.json
index 068ac2b..01ae3be 100644
--- a/webapp/IronCalc/package-lock.json
+++ b/webapp/IronCalc/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@ironcalc/workbook",
-  "version": "0.5.4",
+  "version": "0.5.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@ironcalc/workbook",
-      "version": "0.5.4",
+      "version": "0.5.5",
       "dependencies": {
         "@emotion/react": "^11.14.0",
         "@emotion/styled": "^11.14.0",
diff --git a/webapp/IronCalc/package.json b/webapp/IronCalc/package.json
index 584dc6c..2a38092 100644
--- a/webapp/IronCalc/package.json
+++ b/webapp/IronCalc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ironcalc/workbook",
-  "version": "0.5.4",
+  "version": "0.5.5",
   "type": "module",
   "main": "./dist/ironcalc.js",
   "module": "./dist/ironcalc.js",
diff --git a/webapp/IronCalc/src/IronCalc.tsx b/webapp/IronCalc/src/IronCalc.tsx
index 7efae09..38d4bad 100644
--- a/webapp/IronCalc/src/IronCalc.tsx
+++ b/webapp/IronCalc/src/IronCalc.tsx
@@ -11,10 +11,6 @@ interface IronCalcProperties {
 }
 
 function IronCalc(properties: IronCalcProperties) {
-  properties.model.setUsers([
-    { id: "john@doe.com", sheet: 0, row: 5, column: 6 },
-    { id: "micheal@doe.com", sheet: 0, row: 1, column: 6 },
-  ]);
   return (
     <ThemeProvider theme={theme}>
       <Workbook model={properties.model} workbookState={new WorkbookState()} />
diff --git a/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts b/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts
index f700c2d..2c443ec 100644
--- a/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts
+++ b/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts
@@ -1257,7 +1257,6 @@ export default class WorksheetCanvas {
       ".user-selection-ironcalc",
     ))
       handle.remove();
-      const colors = [];
     users.forEach((user, index) => {
       const { sheet, row, column } = user;
       if (sheet !== this.model.getSelectedSheet()) {