diff --git a/@kindspells/astro-shield/package.json b/@kindspells/astro-shield/package.json
index 5017f67..99fd47c 100644
--- a/@kindspells/astro-shield/package.json
+++ b/@kindspells/astro-shield/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@kindspells/astro-shield",
-	"version": "1.3.7",
+	"version": "1.3.8",
 	"description": "Astro integration to enhance your website's security with SubResource Integrity hashes, Content-Security-Policy headers, and other techniques.",
 	"private": false,
 	"type": "module",
diff --git a/@kindspells/astro-shield/src/core.mts b/@kindspells/astro-shield/src/core.mts
index 1d946ca..631bf4f 100644
--- a/@kindspells/astro-shield/src/core.mts
+++ b/@kindspells/astro-shield/src/core.mts
@@ -87,7 +87,8 @@ const linkStyleReplacer: ElemReplacer = (hash, attrs, setCrossorigin) =>
 		setCrossorigin ? ' crossorigin="anonymous"' : ''
 	}/>`
 
-// TODO: Support more algorithms (different ones, and many for the same element)
+const anonymousCrossOriginRegex =
+	/crossorigin\s*=\s*("anonymous"|'anonymous'|anonymous)/i
 const integrityRegex =
 	/^integrity\s*=\s*("(?<integrity1>sha256-[a-z0-9+\/]{43}=)"|'(?<integrity2>sha256-[a-z0-9+\/]{43}=)')$/i
 const relStylesheetRegex =
@@ -166,10 +167,10 @@ export const updateStaticPageSriHashes = async (
 
 	const pageHashes =
 		h.perPageSriHashes.get(relativeFilepath) ??
-		/** @type {PerPageHashes} */ ({
+		({
 			scripts: new Set(),
 			styles: new Set(),
-		})
+		} satisfies PerPageHashes)
 	h.perPageSriHashes.set(relativeFilepath, pageHashes)
 
 	let updatedContent = content
@@ -277,12 +278,14 @@ export const updateStaticPageSriHashes = async (
 			}
 
 			if (sriHash) {
+				const hasAnonymousCrossOrigin = anonymousCrossOriginRegex.test(attrs)
+
 				updatedContent = updatedContent.replace(
 					match[0],
 					replacer(
 						sriHash,
 						attrs ? ` ${attrs}` : '',
-						setCrossorigin,
+						setCrossorigin && !hasAnonymousCrossOrigin,
 						elemContent,
 					),
 				)
@@ -323,8 +326,7 @@ export const updateDynamicPageSriHashes = async (
 			const attrs = match.groups?.attrs?.trim() ?? ''
 			const elemContent = match.groups?.content ?? ''
 
-			/** @type {string | undefined} */
-			let sriHash = undefined
+			let sriHash: string | undefined = undefined
 			let setCrossorigin = false
 
 			if (attrs) {
@@ -452,12 +454,14 @@ export const updateDynamicPageSriHashes = async (
 			}
 
 			if (sriHash) {
+				const hasAnonymousCrossOrigin = anonymousCrossOriginRegex.test(attrs)
+
 				updatedContent = updatedContent.replace(
 					match[0],
 					replacer(
 						sriHash,
 						attrs ? ` ${attrs}` : '',
-						setCrossorigin,
+						setCrossorigin && !hasAnonymousCrossOrigin,
 						elemContent,
 					),
 				)
@@ -663,8 +667,8 @@ export async function generateSRIHashesModule(
 	}
 
 	if (await doesFileExist(sriHashesModule)) {
-		const hModule: HashesModule = (
-			await import(/* @vite-ignore */ sriHashesModule)
+		const hModule: HashesModule = await import(
+			/* @vite-ignore */ sriHashesModule
 		)
 
 		extResourceHashesChanged = !sriHashesEqual(
@@ -779,8 +783,7 @@ export const getMiddlewareHandler = (
 	globalHashes: MiddlewareHashes,
 	sri: Required<SRIOptions>,
 ): MiddlewareHandler => {
-	/** @satisfies {import('astro').MiddlewareHandler} */
-	return async (_ctx, next) => {
+	return (async (_ctx, next) => {
 		const response = await next()
 		const content = await response.text()
 
@@ -797,7 +800,7 @@ export const getMiddlewareHandler = (
 			headers: response.headers,
 		})
 		return patchedResponse
-	}
+	}) satisfies MiddlewareHandler
 }
 
 /**
@@ -809,8 +812,7 @@ export const getCSPMiddlewareHandler = (
 	securityHeadersOpts: SecurityHeadersOptions,
 	sri: Required<SRIOptions>,
 ): MiddlewareHandler => {
-	/** @satisfies {import('astro').MiddlewareHandler} */
-	return async (_ctx, next) => {
+	return (async (_ctx, next) => {
 		const response = await next()
 		const content = await response.text()
 
@@ -827,7 +829,7 @@ export const getCSPMiddlewareHandler = (
 			headers: patchHeaders(response.headers, pageHashes, securityHeadersOpts),
 		})
 		return patchedResponse
-	}
+	}) satisfies MiddlewareHandler
 }
 
 const middlewareVirtualModuleId = 'virtual:@kindspells/astro-shield/middleware'
@@ -847,8 +849,8 @@ const loadVirtualMiddlewareModule = async (
 
 		if (!shouldRegenerateHashesModule) {
 			try {
-				const hashesModule: HashesModule = (
-					await import(/* @vite-ignore */ sri.hashesModule)
+				const hashesModule: HashesModule = await import(
+					/* @vite-ignore */ sri.hashesModule
 				)
 
 				for (const allowedScript of sri.scriptsAllowListUrls) {
diff --git a/@kindspells/astro-shield/tests/core.test.mts b/@kindspells/astro-shield/src/tests/core.test.mts
similarity index 93%
rename from @kindspells/astro-shield/tests/core.test.mts
rename to @kindspells/astro-shield/src/tests/core.test.mts
index d7abcf3..cfce1de 100644
--- a/@kindspells/astro-shield/tests/core.test.mts
+++ b/@kindspells/astro-shield/src/tests/core.test.mts
@@ -39,7 +39,7 @@ type PageHashesCollection = Record<
 
 const testsDir = new URL('.', import.meta.url).pathname
 const fixturesDir = resolve(testsDir, 'fixtures')
-const rootDir = resolve(testsDir, '..')
+const rootDir = resolve(testsDir, '..', '..')
 const distDir = resolve(rootDir, 'dist')
 
 const getEmptyHashes = () => ({
@@ -624,7 +624,7 @@ describe('updateStaticPageSriHashes', () => {
 				<title>My Test Page</title>
 			</head>
 			<body>
-				<script type="module" src="/core.mjs" integrity="sha256-e91QMz4oDk+n/vnPGAOmoNDYdO61N9wDM5iFlll+6r8="></script>
+				<script type="module" src="/core.mjs" integrity="sha256-57NR9VGwX5U1svn4FZBRRffMg+4n3Fquhfcn6lEtk9Q="></script>
 			</body>
 		</html>`
 
@@ -642,7 +642,7 @@ describe('updateStaticPageSriHashes', () => {
 
 		expect(
 			h.extScriptHashes.has(
-				'sha256-e91QMz4oDk+n/vnPGAOmoNDYdO61N9wDM5iFlll+6r8=',
+				'sha256-57NR9VGwX5U1svn4FZBRRffMg+4n3Fquhfcn6lEtk9Q=',
 			),
 		).toBe(true)
 		expect(h.inlineScriptHashes.size).toBe(0)
@@ -692,6 +692,48 @@ describe('updateStaticPageSriHashes', () => {
 		expect(h.extStyleHashes.size).toBe(0)
 	})
 
+	it('adds sri hash to external script without duplicating the crossorigin attribute (cross origin)', async () => {
+		const remoteScript =
+			'https://raw.githubusercontent.com/KindSpells/astro-shield/ae9521048f2129f633c075b7f7ef24e11bbd1884/main.mjs'
+		const content = `<html>
+			<head>
+				<title>My Test Page</title>
+			</head>
+			<body>
+				<script type="module" src="${remoteScript}" crossorigin="anonymous"></script>
+			</body>
+		</html>`
+
+		const expected = `<html>
+			<head>
+				<title>My Test Page</title>
+			</head>
+			<body>
+				<script type="module" src="${remoteScript}" crossorigin="anonymous" integrity="sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q="></script>
+			</body>
+		</html>`
+
+		const h = getEmptyHashes()
+		const updated = await updateStaticPageSriHashes(
+			console,
+			rootDir,
+			'index.html',
+			content,
+			h,
+		)
+
+		expect(updated).toEqual(expected)
+		expect(h.extScriptHashes.size).toBe(1)
+		expect(
+			h.extScriptHashes.has(
+				'sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q=',
+			),
+		).toBe(true)
+		expect(h.inlineScriptHashes.size).toBe(0)
+		expect(h.inlineStyleHashes.size).toBe(0)
+		expect(h.extStyleHashes.size).toBe(0)
+	})
+
 	it('adds sri hash to external style (same origin)', async () => {
 		const content = `<html>
 			<head>
@@ -1013,6 +1055,53 @@ describe('updateDynamicPageSriHashes', () => {
 		expect(pageHashes.styles.size).toBe(0)
 	})
 
+	it('adds sri hash to external script without duplicating the crossorigin attribute when allow-listed (cross origin)', async () => {
+		const remoteScript =
+			'https://raw.githubusercontent.com/KindSpells/astro-shield/ae9521048f2129f633c075b7f7ef24e11bbd1884/main.mjs'
+		const content = `<html>
+			<head>
+				<title>My Test Page</title>
+			</head>
+			<body>
+				<script type="module" src="${remoteScript}" crossorigin='anonymous'></script>
+			</body>
+		</html>`
+
+		const expected = `<html>
+			<head>
+				<title>My Test Page</title>
+			</head>
+			<body>
+				<script type="module" src="${remoteScript}" crossorigin='anonymous' integrity="sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q="></script>
+			</body>
+		</html>`
+
+		const h = getMiddlewareHashes()
+		h.scripts.set(
+			remoteScript,
+			'sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q=',
+		)
+		const { pageHashes, updatedContent } = await updateDynamicPageSriHashes(
+			console,
+			content,
+			h,
+		)
+
+		expect(updatedContent).toEqual(expected)
+		expect(h.scripts.size).toBe(1)
+		expect(h.styles.size).toBe(0)
+		expect(h.scripts.get(remoteScript)).toEqual(
+			'sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q=',
+		)
+		expect(pageHashes.scripts.size).toBe(1)
+		expect(
+			pageHashes.scripts.has(
+				'sha256-i4WR4ifasidZIuS67Rr6Knsy7/hK1xbVTc8ZAmnAv1Q=',
+			),
+		).toBe(true)
+		expect(pageHashes.styles.size).toBe(0)
+	})
+
 	it('adds sri hash to external style (same origin)', async () => {
 		const content = `<html>
 			<head>
diff --git a/@kindspells/astro-shield/tests/fixtures/fake.css b/@kindspells/astro-shield/src/tests/fixtures/fake.css
similarity index 100%
rename from @kindspells/astro-shield/tests/fixtures/fake.css
rename to @kindspells/astro-shield/src/tests/fixtures/fake.css
diff --git a/@kindspells/astro-shield/tests/fixtures/fake.js b/@kindspells/astro-shield/src/tests/fixtures/fake.js
similarity index 100%
rename from @kindspells/astro-shield/tests/fixtures/fake.js
rename to @kindspells/astro-shield/src/tests/fixtures/fake.js
diff --git a/@kindspells/astro-shield/tests/fixtures/nested/nested.js b/@kindspells/astro-shield/src/tests/fixtures/nested/nested.js
similarity index 100%
rename from @kindspells/astro-shield/tests/fixtures/nested/nested.js
rename to @kindspells/astro-shield/src/tests/fixtures/nested/nested.js
diff --git a/@kindspells/astro-shield/tests/fs.test.mts b/@kindspells/astro-shield/src/tests/fs.test.mts
similarity index 96%
rename from @kindspells/astro-shield/tests/fs.test.mts
rename to @kindspells/astro-shield/src/tests/fs.test.mts
index b9b37da..8d316e9 100644
--- a/@kindspells/astro-shield/tests/fs.test.mts
+++ b/@kindspells/astro-shield/src/tests/fs.test.mts
@@ -16,7 +16,7 @@ import { doesFileExist, scanDirectory } from '#as/fs.mts'
 const testsDir = new URL('.', import.meta.url).pathname
 
 describe('doesFileExist', () => {
-	it.each([['./core.test.mts'], ['../src/core.mts'], ['../src/main.mts']])(
+	it.each([['./core.test.mts'], ['../core.mts'], ['../main.mts']])(
 		'returns true for existing files',
 		async (filename: string) => {
 			expect(await doesFileExist(resolve(testsDir, filename))).toBe(true)
diff --git a/@kindspells/astro-shield/tests/headers.test.mts b/@kindspells/astro-shield/src/tests/headers.test.mts
similarity index 100%
rename from @kindspells/astro-shield/tests/headers.test.mts
rename to @kindspells/astro-shield/src/tests/headers.test.mts
diff --git a/@kindspells/astro-shield/tests/main.test.mts b/@kindspells/astro-shield/src/tests/main.test.mts
similarity index 100%
rename from @kindspells/astro-shield/tests/main.test.mts
rename to @kindspells/astro-shield/src/tests/main.test.mts
diff --git a/@kindspells/astro-shield/tests/state.test.mts b/@kindspells/astro-shield/src/tests/state.test.mts
similarity index 100%
rename from @kindspells/astro-shield/tests/state.test.mts
rename to @kindspells/astro-shield/src/tests/state.test.mts
diff --git a/@kindspells/astro-shield/tsconfig.json b/@kindspells/astro-shield/tsconfig.json
index 2738177..0ae270d 100644
--- a/@kindspells/astro-shield/tsconfig.json
+++ b/@kindspells/astro-shield/tsconfig.json
@@ -35,5 +35,5 @@
 
 		"skipLibCheck": true
 	},
-	"include": ["src/*", "tests/**/*.mts", "e2e/**/*.mts"]
+	"include": ["src/*", "e2e/**/*.mts"]
 }
diff --git a/@kindspells/astro-shield/vitest.config.unit.mts b/@kindspells/astro-shield/vitest.config.unit.mts
index c21f2a0..cb8a949 100644
--- a/@kindspells/astro-shield/vitest.config.unit.mts
+++ b/@kindspells/astro-shield/vitest.config.unit.mts
@@ -26,6 +26,6 @@ export default defineConfig({
 			},
 			reportsDirectory: 'coverage-unit',
 		},
-		include: ['tests/**/*.test.mts'],
+		include: ['src/**/tests/**/*.test.mts'],
 	},
 })