diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a08fe74..e0c2d6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,9 @@ jobs:
       matrix:
         os:
           - ubuntu-24.04
-          - macos-15-intel
+          - ubuntu-24.04-arm
+          - macos-26
+          - macos-26-intel
           - windows-2025
     defaults:
       run:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9958069..5c28782 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install Zig
         uses: mlugg/setup-zig@d1434d08867e3ee9daa34448df10607b98908d29 # 2.2.1
@@ -65,7 +65,7 @@ jobs:
           echo "bundle_filename=$BUNDLE_FILENAME" >> "$GITHUB_OUTPUT"
 
       - name: Upload package bundle artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: package-bundle
           path: dist/${{ steps.bundle.outputs.bundle_filename }}
@@ -80,7 +80,9 @@ jobs:
       matrix:
         os:
           - ubuntu-24.04
-          - macos-15-intel
+          - ubuntu-24.04-arm
+          - macos-26
+          - macos-26-intel
           - windows-2025
     defaults:
       run:
@@ -88,7 +90,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install Zig
         uses: mlugg/setup-zig@d1434d08867e3ee9daa34448df10607b98908d29 # 2.2.1
@@ -103,7 +105,7 @@ jobs:
           version: nightly-new-compiler
 
       - name: Download package bundle artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: package-bundle
           path: dist
@@ -126,10 +128,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Download package bundle artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: package-bundle
           path: dist
diff --git a/examples/headers.roc b/examples/headers.roc
index c2ee92f..f5b40a0 100644
--- a/examples/headers.roc
+++ b/examples/headers.roc
@@ -21,13 +21,11 @@ main! : List(Str) => Try({}, [Exit(I32), StdoutErr(Str), ..])
 main! = |_args| {
 	request = Request.from_method(GET)
 		.with_uri("https://api.example.com/items")
-		.with_headers(
-			[
-				{ name: "Accept", value: "application/json" },
-				{ name: "X-Trace-Id", value: "demo-123" },
-				{ name: "X-Trace-Id", value: "demo-456" },
-			],
-		)
+		.with_headers([
+			{ name: "Accept", value: "application/json" },
+			{ name: "X-Trace-Id", value: "demo-123" },
+			{ name: "X-Trace-Id", value: "demo-456" },
+		])
 
 	Stdout.line!(Str.inspect(request.headers()))?
 
@@ -46,7 +44,15 @@ expect {
 }
 
 ## Header parsing reports missing required fields.
-expect parse_headers("content-length: 42\r\nx-trace-id: demo-123\r\n") == Err(Encoding.HttpHeader.MissingRequired)
+expect
+	match parse_headers("content-length: 42\r\nx-trace-id: demo-123\r\n") {
+		Err(Encoding.HttpHeader.MissingRequired) => Bool.True
+		_ => Bool.False
+	}
 
 ## Header parsing reports invalid field values.
-expect parse_headers("accept: application/json\r\ncontent-length: nope\r\nx-trace-id: demo-123\r\n") == Err(Encoding.HttpHeader.BadHeader)
+expect
+	match parse_headers("accept: application/json\r\ncontent-length: nope\r\nx-trace-id: demo-123\r\n") {
+		Err(Encoding.HttpHeader.BadHeader) => Bool.True
+		_ => Bool.False
+	}