diff --git a/.changeset/sixty-pans-kneel.md b/.changeset/sixty-pans-kneel.md
new file mode 100644
index 000000000..2e8adb157
--- /dev/null
+++ b/.changeset/sixty-pans-kneel.md
@@ -0,0 +1,5 @@
+---
+'@shopify/shopify-api': patch
+---
+
+Fixing host validation to work with unified admin shops
diff --git a/lib/auth/get-embedded-app-url.ts b/lib/auth/get-embedded-app-url.ts
index 804aee7d4..e34d8d8f7 100644
--- a/lib/auth/get-embedded-app-url.ts
+++ b/lib/auth/get-embedded-app-url.ts
@@ -37,7 +37,7 @@ export function getEmbeddedAppUrl(config: ConfigInterface) {
 
 export function buildEmbeddedAppUrl(config: ConfigInterface) {
   return (host: string): string => {
-    sanitizeHost(config)(host, true);
+    sanitizeHost()(host, true);
     const decodedHost = decodeHost(host);
 
     return `https://${decodedHost}/apps/${config.apiKey}`;
diff --git a/lib/utils/__tests__/shop-validator.test.ts b/lib/utils/__tests__/shop-validator.test.ts
index 66de346a7..434a05633 100644
--- a/lib/utils/__tests__/shop-validator.test.ts
+++ b/lib/utils/__tests__/shop-validator.test.ts
@@ -22,6 +22,7 @@ const VALID_HOSTS = [
   'my-other-host.myshopify.com/admin',
   'my-other-other-host.myshopify.io/admin',
   'admin.shopify.com/store/my-shop',
+  'admin.spin.dev/store/my-shop',
 ].map((testhost) => {
   return {testhost, base64host: Buffer.from(testhost).toString('base64')};
 });
diff --git a/lib/utils/index.ts b/lib/utils/index.ts
index b779bca2b..8eb4279a3 100644
--- a/lib/utils/index.ts
+++ b/lib/utils/index.ts
@@ -7,7 +7,7 @@ import {versionCompatible, versionPriorTo} from './version-compatible';
 export function shopifyUtils(config: ConfigInterface) {
   return {
     sanitizeShop: sanitizeShop(config),
-    sanitizeHost: sanitizeHost(config),
+    sanitizeHost: sanitizeHost(),
     validateHmac: validateHmac(config),
     versionCompatible: versionCompatible(config),
     versionPriorTo: versionPriorTo(config),
diff --git a/lib/utils/shop-validator.ts b/lib/utils/shop-validator.ts
index 531d2fe35..931dc5a33 100644
--- a/lib/utils/shop-validator.ts
+++ b/lib/utils/shop-validator.ts
@@ -26,15 +26,23 @@ export function sanitizeShop(config: ConfigInterface) {
   };
 }
 
-export function sanitizeHost(config: ConfigInterface) {
+export function sanitizeHost() {
   return (host: string, throwOnInvalid = false): string | null => {
     const base64regex = /^[0-9a-zA-Z+/]+={0,2}$/;
 
     let sanitizedHost = base64regex.test(host) ? host : null;
     if (sanitizedHost) {
-      const url = new URL(`https://${decodeHost(sanitizedHost)}`);
-      // allow-list of origins
-      if (!/\.((my)?shopify\.com|myshopify\.io|spin\.dev)$/.test(url.hostname)) {
+      const {hostname} = new URL(`https://${decodeHost(sanitizedHost)}`);
+
+      const originsRegex = [
+        'myshopify\\.com',
+        'shopify\\.com',
+        'myshopify\\.io',
+        'spin\\.dev',
+      ];
+
+      const hostRegex = new RegExp(`\\.(${originsRegex.join('|')})$`);
+      if (!hostRegex.test(hostname)) {
         sanitizedHost = null;
       }
     }