diff --git a/Cargo.toml b/Cargo.toml
index 77ff301..2aad91f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://github.com/kennytm/qrcode-rust"
 readme = "README.md"
 documentation = "http://kennytm.github.io/qrcode-rust/"
 exclude = [
-    ".travis.yml", ".gitignore"
+    ".travis.yml", ".gitignore", "update_doc.sh"
 ]
 
 [dependencies]
diff --git a/src/lib.rs b/src/lib.rs
index c79763c..c7678a6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -196,6 +196,32 @@ impl QrCode {
         self.content
     }
 
+    /// Renders the QR code into an image. The result is an image builder, which
+    /// you may do some additional configuration before copying it into a
+    /// concrete image.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # extern crate image;
+    /// # extern crate qrcode;
+    /// # use qrcode::QrCode;
+    /// # use image::Rgb;
+    /// # fn main() {
+    ///
+    /// let image = QrCode::new(b"hello").unwrap()
+    ///                     .render()
+    ///                     .dark_color(Rgb { data: [0, 0, 128] })
+    ///                     .light_color(Rgb { data: [224, 224, 224] }) // adjust colors
+    ///                     .quiet_zone(false)      // disable quiet zone (white border)
+    ///                     .min_width(300)         // sets minimum image size
+    ///                     .to_image();
+    ///
+    /// # }
+    /// ```
+    ///
+    /// Note: the `image` crate itself also provides method to rotate the image,
+    /// or overlay a logo on top of the QR code.
     #[cfg(feature="image")]
     pub fn render<P: BlankAndWhitePixel + 'static>(&self) -> Renderer<P> {
         let quiet_zone = if self.version.is_micro() { 2 } else { 4 };
diff --git a/update_doc.sh b/update_doc.sh
new file mode 100755
index 0000000..29b093d
--- /dev/null
+++ b/update_doc.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# Generate documentation and commit into the gh-pages branch.
+
+set -euo pipefail
+
+VERSION=$(grep -w version -m 1 Cargo.toml)
+COMMIT=$(git rev-parse HEAD)
+
+rustup default nightly
+cargo doc
+git worktree add doc gh-pages
+cd doc
+git rm -r .
+git reset HEAD .gitignore index.html
+git checkout -- .gitignore index.html
+mv ../target/doc/qrcode .
+mv ../target/doc/*.{txt,woff,js,css} .
+mkdir src
+mv ../target/doc/src/qrcode src
+git add .
+git commit -m "Update doc for ${VERSION} (${COMMIT})"
+cd ..
+rm -rf doc
+git worktree prune
+