diff --git a/src/transforms/ci:upgrade-artifact-actions-to-v4.js b/src/transforms/ci:upgrade-artifact-actions-to-v4.js
new file mode 100644
index 0000000..217a310
--- /dev/null
+++ b/src/transforms/ci:upgrade-artifact-actions-to-v4.js
@@ -0,0 +1,84 @@
+import replace from '../lib/text/replace.js';
+import find from '../lib/text/find.js';
+
+export const description = 'Upgrade artifact actions to v4.';
+
+export const commit = {
+	type: 'config',
+	scope: 'ci',
+	subject: description,
+};
+
+const workflowFile = '.github/workflows/ci.yml';
+const action = (name, version) => `uses: actions/${name}-artifact@${version}`;
+
+export async function postcondition({read, assert}) {
+	assert(
+		await find([action('upload', 'v4')], [workflowFile], {
+			read,
+			method: find.exact,
+		}),
+	);
+	assert(
+		await find([action('download', 'v4')], [workflowFile], {
+			read,
+			method: find.exact,
+		}),
+	);
+	assert(
+		!(await find([action('upload', 'v3')], [workflowFile], {
+			read,
+			method: find.exact,
+		})),
+	);
+	assert(
+		!(await find([action('download', 'v3')], [workflowFile], {
+			read,
+			method: find.exact,
+		})),
+	);
+}
+
+export async function precondition({read, assert}) {
+	assert(
+		await find([action('upload', 'v3')], [workflowFile], {
+			read,
+			method: find.exact,
+		}),
+	);
+	assert(
+		await find([action('download', 'v3')], [workflowFile], {
+			read,
+			method: find.exact,
+		}),
+	);
+	assert(
+		!(await find([action('upload', 'v4')], [workflowFile], {
+			read,
+			method: find.exact,
+		})),
+	);
+	assert(
+		!(await find([action('download', 'v4')], [workflowFile], {
+			read,
+			method: find.exact,
+		})),
+	);
+}
+
+export async function apply({read, write}) {
+	await replace(
+		[
+			[action('upload', 'v3'), () => action('upload', 'v4')],
+			[action('download', 'v3'), () => action('download', 'v4')],
+		],
+		[workflowFile],
+		{
+			read,
+			write,
+			method: replace.all,
+		},
+	);
+}
+
+export const dependencies = ['ava:test-build'];