diff --git a/.changeset/nervous-pianos-repeat.md b/.changeset/nervous-pianos-repeat.md
new file mode 100644
index 0000000..c939c11
--- /dev/null
+++ b/.changeset/nervous-pianos-repeat.md
@@ -0,0 +1,17 @@
+---
+"@portabletext/react-pdf": major
+---
+
+The package is now ESM only, and requires Node.js 22.12 or later
+
+#### When you will see a difference
+
+Only if you load this package with `require()`, or build on Node.js 20 or earlier. If you already `import` it, nothing changes.
+
+#### What changes
+
+The package no longer ships a CommonJS build. `require("@portabletext/react-pdf")` will fail, where before it resolved to `dist/index.cjs`. Use `import` instead, or a dynamic `await import()` from a CommonJS file.
+
+This brings the package in line with the rest of the Portable Text packages, which are already ESM only.
+
+Node.js 20 reached end of life in April 2026. The package previously declared no `engines` range at all, so nothing was enforced.
diff --git a/package.json b/package.json
index ac41ad5..408eada 100644
--- a/package.json
+++ b/package.json
@@ -25,13 +25,11 @@
 		".": {
 			"source": "./src/index.ts",
 			"import": "./dist/index.js",
-			"require": "./dist/index.cjs",
 			"default": "./dist/index.js"
 		},
 		"./package.json": "./package.json"
 	},
-	"main": "./dist/index.cjs",
-	"module": "./dist/index.js",
+	"main": "./dist/index.js",
 	"types": "./dist/index.d.ts",
 	"files": [
 		"dist",
@@ -97,6 +95,9 @@
 		"vite": "^7.1.3",
 		"vitest": "^3.2.4"
 	},
+	"engines": {
+		"node": ">=22.12"
+	},
 	"packageManager": "pnpm@10.11.1",
 	"publishConfig": {
 		"access": "public"