diff --git a/src/inject-cloudcannon.config.cjs b/src/inject-cloudcannon.config.cjs
new file mode 100644
index 0000000..c2813fa
--- /dev/null
+++ b/src/inject-cloudcannon.config.cjs
@@ -0,0 +1,62 @@
+const pluginCloudCannon = require('eleventy-plugin-cloudcannon');
+
+// The build process in CloudCannon sets these:
+const eleventyVersion = process.env.CC_ELEVENTY_VERSION; // Version of 11ty/eleventy installed
+const defaultConfigPath = process.env.CC_ELEVENTY_CONFIG; // Where the site's config was moved
+
+// Supports @11ty/eleventy v0, v1, v2
+function configOld(eleventyConfig) {
+	if (!defaultConfigPath) {
+		console.log('ℹ️ Not installing eleventy-plugin-cloudcannon (legacy): no site config');
+		return eleventyConfig;
+	}
+
+	console.log('ℹ️ Installing eleventy-plugin-cloudcannon (legacy)...');
+
+	let defaultConfig;
+	try {
+		defaultConfig = require(defaultConfigPath);
+	} catch (e) {
+		console.error('⚠️ Unable to require your config from eleventy-plugin-cloudcannon (legacy).');
+		console.error(e);
+		throw e;
+	}
+
+	const config = defaultConfig?.call?.(this, eleventyConfig);
+	console.log('ℹ️ Adding eleventy-plugin-cloudcannon (legacy)...');
+
+	eleventyConfig.addPlugin(pluginCloudCannon, config);
+	console.log('🆗 Installed eleventy-plugin-cloudcannon (legacy)!');
+
+	return config;
+}
+
+// Supports @11ty/eleventy v3
+async function config(eleventyConfig) {
+	if (!defaultConfigPath) {
+		console.log('ℹ️ Not installing eleventy-plugin-cloudcannon: no site config');
+		return eleventyConfig;
+	}
+
+	console.log('ℹ️ Installing eleventy-plugin-cloudcannon...');
+
+	let defaultConfig;
+	try {
+		const defaultConfigImport = await import(defaultConfigPath);
+		defaultConfig = defaultConfigImport?.default || defaultConfigImport;
+	} catch (e) {
+		console.error('⚠️ Unable to require your config from eleventy-plugin-cloudcannon.');
+		console.error(e);
+		throw e;
+	}
+
+	const config = await defaultConfig?.call?.(this, eleventyConfig);
+	console.log('ℹ️ Adding eleventy-plugin-cloudcannon...');
+
+	eleventyConfig.addPlugin(pluginCloudCannon, config);
+	console.log('🆗 Installed eleventy-plugin-cloudcannon!');
+
+	return config;
+}
+
+module.exports = eleventyVersion?.match(/^[0|1|2]\./) ? configOld : config;
diff --git a/src/inject-cloudcannon.config.js b/src/inject-cloudcannon.config.js
deleted file mode 100644
index 22481b6..0000000
--- a/src/inject-cloudcannon.config.js
+++ /dev/null
@@ -1,21 +0,0 @@
-const pluginCloudCannon = require('eleventy-plugin-cloudcannon');
-
-let defaultConfig;
-
-try {
-	defaultConfig = require('./default-eleventy.config.js');
-} catch (e) {
-	console.error('⚠️ Unable to require your config from eleventy-plugin-cloudcannon.');
-	console.error(e);
-}
-
-// Used when the 'Manage eleventy-plugin-cloudcannon manually' option is disabled in CloudCannon.
-// Adds this plugin after running the renamed default config file.
-module.exports = function (eleventyConfig, ...args) {
-	console.log('ℹ️ Installing eleventy-plugin-cloudcannon...');
-	const config = defaultConfig?.apply?.(this, [eleventyConfig, ...args]);
-	console.log('ℹ️ Adding eleventy-plugin-cloudcannon...');
-	eleventyConfig.addPlugin(pluginCloudCannon, config);
-	console.log('🆗 Installed eleventy-plugin-cloudcannon!');
-	return config;
-};