diff --git a/crates/effects/src/stylize.rs b/crates/effects/src/stylize.rs
index c7b3cff2..1de19312 100644
--- a/crates/effects/src/stylize.rs
+++ b/crates/effects/src/stylize.rs
@@ -131,7 +131,7 @@ pub fn scribble(path: &PathData, b: Rect, p: &Value) -> PathData {
             }
         }
         xs.sort_by(f64::total_cmp);
-        let mut spans: Vec<(f64, f64)> = xs.chunks_exact(2).map(|s| (s[0] - overlap, s[1] + overlap)).collect();
+        let mut spans: Vec<(f64, f64)> = xs.as_chunks::<2>().0.iter().map(|s| (s[0] - overlap, s[1] + overlap)).collect();
         if row % 2 == 1 {
             spans.reverse();
         }
diff --git a/crates/pathops/src/offset.rs b/crates/pathops/src/offset.rs
index b7f87778..623ffbbb 100644
--- a/crates/pathops/src/offset.rs
+++ b/crates/pathops/src/offset.rs
@@ -160,7 +160,7 @@ fn deep_point(bp: &BezPath) -> Option<kurbo::Point> {
             _ => {}
         });
         xs.sort_by(f64::total_cmp);
-        for w in xs.chunks_exact(2) {
+        for w in xs.as_chunks::<2>().0 {
             let span = w[1] - w[0];
             if best.is_none_or(|(b, _)| span > b) {
                 best = Some((span, kurbo::Point::new((w[0] + w[1]) / 2.0, y)));
diff --git a/crates/render/src/proof.rs b/crates/render/src/proof.rs
index 840a7bcd..9a9a2515 100644
--- a/crates/render/src/proof.rs
+++ b/crates/render/src/proof.rs
@@ -247,7 +247,7 @@ pub(crate) fn post(pixels: &mut [u8], opts: &RenderOptions) {
     let lut = cms::active().proof_lut(proof);
     let mut last_in = [0u8; 4];
     let mut last_out = [0u8; 4];
-    for px in pixels.chunks_exact_mut(4) {
+    for px in pixels.as_chunks_mut::<4>().0 {
         let a = px[3];
         if a == 0 {
             continue;
diff --git a/crates/testkit/src/raster.rs b/crates/testkit/src/raster.rs
index a639291f..1dbd9743 100644
--- a/crates/testkit/src/raster.rs
+++ b/crates/testkit/src/raster.rs
@@ -33,7 +33,7 @@ impl Image {
     }
     /// Number of pixels for which `pred(rgba)` holds.
     pub fn count(&self, pred: impl Fn([u8; 4]) -> bool) -> usize {
-        self.rgba.chunks_exact(4).filter(|p| pred([p[0], p[1], p[2], p[3]])).count()
+        self.rgba.as_chunks::<4>().0.iter().filter(|p| pred([p[0], p[1], p[2], p[3]])).count()
     }
     /// Pixels that differ from opaque white and are not fully transparent.
     pub fn ink(&self) -> usize {
diff --git a/crates/text/src/layout.rs b/crates/text/src/layout.rs
index facb80ec..0c83957f 100644
--- a/crates/text/src/layout.rs
+++ b/crates/text/src/layout.rs
@@ -158,7 +158,7 @@ fn poly_intervals(polys: &[Vec<Point>], y: f64) -> Vec<(f64, f64)> {
         }
     }
     xs.sort_by(f64::total_cmp);
-    xs.chunks_exact(2).map(|c| (c[0], c[1])).collect()
+    xs.as_chunks::<2>().0.iter().map(|c| (c[0], c[1])).collect()
 }
 
 /// Union of sorted-or-not intervals.
diff --git a/crates/tools/src/builder.rs b/crates/tools/src/builder.rs
index e78341b6..3a27c581 100644
--- a/crates/tools/src/builder.rs
+++ b/crates/tools/src/builder.rs
@@ -229,7 +229,7 @@ pub fn hatch(path: &BezPath, gap: f64) -> BezPath {
             }
         }
         xs.sort_by(f64::total_cmp);
-        for pair in xs.chunks_exact(2) {
+        for pair in xs.as_chunks::<2>().0 {
             out.move_to(unrot(Point::new(pair[0], y)));
             out.line_to(unrot(Point::new(pair[1], y)));
         }
diff --git a/crates/trace/src/quantize.rs b/crates/trace/src/quantize.rs
index 0b26de74..6b596cc8 100644
--- a/crates/trace/src/quantize.rs
+++ b/crates/trace/src/quantize.rs
@@ -19,7 +19,7 @@ fn luma(p: [u8; 4]) -> u8 {
 
 /// Reduce `img` to a palette according to `params.mode`.
 pub fn quantize(img: &Raster, params: &TraceParams) -> Quantized {
-    let px = img.rgba.chunks_exact(4).map(|c| [c[0], c[1], c[2], c[3]]);
+    let px = img.rgba.as_chunks::<4>().0.iter().map(|c| [c[0], c[1], c[2], c[3]]);
     match params.mode {
         Mode::BlackAndWhite => {
             let t = params.threshold;
@@ -38,7 +38,7 @@ pub fn quantize(img: &Raster, params: &TraceParams) -> Quantized {
         }
         Mode::Grayscale => {
             let mut hist = [0u64; 256];
-            for p in img.rgba.chunks_exact(4) {
+            for p in img.rgba.as_chunks::<4>().0 {
                 if p[3] >= 128 {
                     hist[luma([p[0], p[1], p[2], p[3]]) as usize] += 1;
                 }
@@ -58,7 +58,7 @@ pub fn quantize(img: &Raster, params: &TraceParams) -> Quantized {
         Mode::Color => {
             // 15-bit colour histogram with per-bin sums (exact bin means).
             let mut bins: Vec<Bin> = vec![Bin::default(); 1 << 15];
-            for p in img.rgba.chunks_exact(4) {
+            for p in img.rgba.as_chunks::<4>().0 {
                 if p[3] >= 128 {
                     let b = &mut bins[key(p[0], p[1], p[2])];
                     b.n += 1;