diff --git a/Cargo.lock b/Cargo.lock
index a3e7735..4a0a133 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -295,8 +295,9 @@ dependencies = [
 
 [[package]]
 name = "kurbo"
-version = "0.5.11"
-source = "git+https://github.com/linebender/kurbo?rev=7bd7e66bd137e757305d170a0f9f2b4f7beeb299#7bd7e66bd137e757305d170a0f9f2b4f7beeb299"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5657aca5a36917d389d717f1a0c24d5ebcee5551fda8c1f555af597565d408e4"
 dependencies = [
  "arrayvec",
 ]
@@ -513,9 +514,9 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
 [[package]]
 name = "piet"
-version = "0.0.12"
+version = "0.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29420eccb68d6b9ad2f8dd87caf9c3bcd3bbd056bfe67871c48b6efab9316b79"
+checksum = "552531e1eeb85c966172849155b25b555f76c10cc479396579fac058a63269a4"
 dependencies = [
  "kurbo",
 ]
@@ -524,7 +525,6 @@ dependencies = [
 name = "piet-gpu"
 version = "0.1.0"
 dependencies = [
- "kurbo",
  "piet",
  "piet-gpu-hal",
  "piet-gpu-types",
diff --git a/Cargo.toml b/Cargo.toml
index efa5f88..f71f2de 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,3 @@ members = [
     "piet-gpu-hal",
     "piet-gpu-types"
 ]
-
-# TODO: remove when the flatten feature is published
-[patch.crates-io]
-kurbo = { git = "https://github.com/linebender/kurbo", rev = "7bd7e66bd137e757305d170a0f9f2b4f7beeb299" }
diff --git a/piet-gpu-hal/src/vulkan.rs b/piet-gpu-hal/src/vulkan.rs
index ff4587e..2fac015 100644
--- a/piet-gpu-hal/src/vulkan.rs
+++ b/piet-gpu-hal/src/vulkan.rs
@@ -62,7 +62,8 @@ pub struct Buffer {
 
 pub struct Image {
     image: vk::Image,
-    image_memory: vk::DeviceMemory,
+    // Not used now but probably will be for destruction.
+    _image_memory: vk::DeviceMemory,
     image_view: vk::ImageView,
     extent: vk::Extent3D,
 }
@@ -475,7 +476,7 @@ impl crate::Device for VkDevice {
         )?;
         Ok(Image {
             image,
-            image_memory,
+            _image_memory: image_memory,
             image_view,
             extent,
         })
@@ -984,7 +985,7 @@ impl VkSwapchain {
     pub unsafe fn image(&self, idx: usize) -> Image {
         Image {
             image: self.images[idx],
-            image_memory: vk::DeviceMemory::null(),
+            _image_memory: vk::DeviceMemory::null(),
             image_view: vk::ImageView::null(),
             extent: vk::Extent3D {
                 width: self.extent.width,
diff --git a/piet-gpu/Cargo.toml b/piet-gpu/Cargo.toml
index a922a46..6bdf178 100644
--- a/piet-gpu/Cargo.toml
+++ b/piet-gpu/Cargo.toml
@@ -21,8 +21,7 @@ path = "../piet-gpu-hal"
 path = "../piet-gpu-types"
 
 [dependencies]
-kurbo = "0.5.11"
-piet = "0.0.12"
+piet = "0.0.13"
 png = "0.16.2"
 rand = "0.7.3"
 roxmltree = "0.11"
diff --git a/piet-gpu/bin/cli.rs b/piet-gpu/bin/cli.rs
index 1a3c37a..839c262 100644
--- a/piet-gpu/bin/cli.rs
+++ b/piet-gpu/bin/cli.rs
@@ -2,9 +2,6 @@ use std::fs::File;
 use std::io::BufWriter;
 use std::path::Path;
 
-
-use piet::Color;
-
 use piet_gpu_hal::vulkan::VkInstance;
 use piet_gpu_hal::{CmdBuf, Device, Error, MemFlags};
 
diff --git a/piet-gpu/src/lib.rs b/piet-gpu/src/lib.rs
index 2adbfc1..a47737a 100644
--- a/piet-gpu/src/lib.rs
+++ b/piet-gpu/src/lib.rs
@@ -8,7 +8,6 @@ use rand::{Rng, RngCore};
 use piet::kurbo::{BezPath, Circle, Line, Point, Vec2};
 use piet::{Color, RenderContext};
 
-use piet_gpu_hal::vulkan::VkInstance;
 use piet_gpu_hal::{CmdBuf, Device, Error, ImageLayout, MemFlags};
 
 use pico_svg::PicoSvg;
diff --git a/piet-gpu/src/pico_svg.rs b/piet-gpu/src/pico_svg.rs
index 2423dda..a4c92d0 100644
--- a/piet-gpu/src/pico_svg.rs
+++ b/piet-gpu/src/pico_svg.rs
@@ -4,7 +4,7 @@ use std::str::FromStr;
 
 use roxmltree::Document;
 
-use kurbo::BezPath;
+use piet::kurbo::{Affine, BezPath};
 
 use piet::{Color, RenderContext};
 
@@ -38,7 +38,7 @@ impl PicoSvg {
             if el.is_element() {
                 let d = el.attribute("d").ok_or("missing 'd' attribute")?;
                 let bp = BezPath::from_svg(d)?;
-                let path = kurbo::Affine::scale(scale) * bp;
+                let path = Affine::scale(scale) * bp;
                 if let Some(fill_color) = el.attribute("fill") {
                     let color = parse_color(fill_color);
                     items.push(Item::Fill(FillItem { color, path: path.clone() }));
diff --git a/piet-gpu/src/render_ctx.rs b/piet-gpu/src/render_ctx.rs
index c08aca9..6367301 100644
--- a/piet-gpu/src/render_ctx.rs
+++ b/piet-gpu/src/render_ctx.rs
@@ -248,7 +248,7 @@ fn flatten_shape(
     let mut points = Vec::new();
     let mut start_pt = None;
     let mut last_pt = None;
-    kurbo::flatten(path, TOLERANCE, |el| {
+    piet::kurbo::flatten(path, TOLERANCE, |el| {
         match el {
             PathEl::MoveTo(p) => {
                 let scene_pt = to_scene_point(p);
@@ -296,7 +296,7 @@ impl Text for PietGpuText {
         &mut self,
         _font: &Self::Font,
         _text: &str,
-        _width: f64,
+        _width: impl Into<Option<f64>>,
     ) -> Self::TextLayoutBuilder {
         unimplemented!();
     }
@@ -325,7 +325,7 @@ impl TextLayout for PietGpuTextLayout {
         0.0
     }
 
-    fn update_width(&mut self, _new_width: f64) -> Result<(), Error> {
+    fn update_width(&mut self, _new_width: impl Into<Option<f64>>) -> Result<(), Error> {
         unimplemented!()
     }