diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..435ed75
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+target = "wasm32-unknown-unknown"
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 669c3ec..c02ff8e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,17 +2,18 @@
 name = "plotters-canvas"
 version = "0.3.1"
 authors = ["Hao Hou <haohou302@gmail.com>"]
-edition = "2018"
+edition = "2021"
 license = "MIT"
 description = "Plotters HTML5 Canvas Backend"
 homepage = "https://plotters-rs.github.io"
 repository = "https://github.com/plotters-rs/plotters-canvas"
 readme = "README.md"
+resolver = "2"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies.plotters-backend]
-git = "https://github.com/plotters-rs/plotters"
+version = "0.3"
 
 [dependencies]
 js-sys= "0.3.32"
@@ -27,4 +28,4 @@ wasm-bindgen-test = "^0.3.17"
 
 [dev-dependencies.plotters]
 default_features = false
-git = "https://github.com/plotters-rs/plotters"
+version = "0.3"
diff --git a/src/canvas.rs b/src/canvas.rs
index d1c9dca..932422e 100644
--- a/src/canvas.rs
+++ b/src/canvas.rs
@@ -556,19 +556,19 @@ mod test {
         // not horizontal nor vertical
         assert_eq!(
             ((10.0, 10.0), (20.0, 20.0)),
-            fine_hor_ver_lines((10.0, 10.0), (20.0, 20.0))
+            fine_hor_ver_lines((10, 10), (20, 20))
         );
 
         // vertical
         assert_eq!(
             ((9.5, 10.0), (19.5, 10.0)),
-            fine_hor_ver_lines((10.0, 10.0), (20.0, 10.0))
+            fine_hor_ver_lines((10, 10), (20, 10))
         );
 
         // horizontal
         assert_eq!(
             ((10.0, 9.5), (10.0, 19.5)),
-            fine_hor_ver_lines((10.0, 10.0), (10.0, 20.0))
+            fine_hor_ver_lines((10, 10), (10, 20))
         );
     }
 }