diff --git a/Cargo.toml b/Cargo.toml
index ea0e2db..069231f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "plotters-piston"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Hao Hou <haohou302@gmail.com>"]
 edition = "2018"
 license = "MIT"
@@ -12,9 +12,9 @@ readme = "README.md"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-plotters-backend = "0.3.0"
+plotters-backend = "0.3.2"
 piston_window = "0.120.0"
 
 [dev-dependencies]
-plotters = {version = "0.3.0", default_features = false, features = ["ttf", "all_series"]}
-systemstat = "0.1.5"
+plotters = { version = "0.3.1", default_features = false, features = ["ttf", "all_series"] }
+systemstat = "0.1.10"
diff --git a/examples/cpustat.rs b/examples/cpustat.rs
index 5b08315..0ce8f5e 100644
--- a/examples/cpustat.rs
+++ b/examples/cpustat.rs
@@ -1,6 +1,6 @@
 use piston_window::{EventLoop, PistonWindow, WindowSettings};
 use plotters::prelude::*;
-use plotters_piston::{draw_piston_window, PistonBackend};
+use plotters_piston::draw_piston_window;
 use systemstat::platform::common::Platform;
 use systemstat::System;
 
@@ -43,7 +43,7 @@ fn main() {
             .caption("Real Time CPU Usage", ("sans-serif", 30))
             .x_label_area_size(40)
             .y_label_area_size(50)
-            .build_ranged(0..N_DATA_POINTS as u32, 0f32..1f32)?;
+            .build_cartesian_2d(0..N_DATA_POINTS as u32, 0f32..1f32)?;
 
         cc.configure_mesh()
             .x_label_formatter(&|x| format!("{}", -(LENGTH as f32) + (*x as f32 / FPS as f32)))