diff --git a/deno.json b/deno.json
index b070f13..1fdf132 100644
--- a/deno.json
+++ b/deno.json
@@ -20,7 +20,7 @@
     "@apiclient.xyz/docker": "npm:@apiclient.xyz/docker@^5.1.0",
     "@apiclient.xyz/cloudflare": "npm:@apiclient.xyz/cloudflare@6.4.3",
     "@push.rocks/smartacme": "npm:@push.rocks/smartacme@^8.0.0",
-    "@push.rocks/smartregistry": "npm:@push.rocks/smartregistry@^2.1.2",
+    "@push.rocks/smartregistry": "npm:@push.rocks/smartregistry@^2.2.0",
     "@push.rocks/smarts3": "npm:@push.rocks/smarts3@^5.1.0"
   },
   "compilerOptions": {
diff --git a/ts/classes/registry.ts b/ts/classes/registry.ts
index da18bf9..272a222 100644
--- a/ts/classes/registry.ts
+++ b/ts/classes/registry.ts
@@ -118,18 +118,16 @@ export class RegistryManager {
       });
 
       // Read body for non-GET requests
-      // IMPORTANT: smartregistry expects Buffer (not Uint8Array) for proper digest calculation
-      // Buffer.isBuffer(Uint8Array) returns false, causing JSON.stringify which corrupts the data
-      let body: Buffer | undefined;
+      // smartregistry v2.2.0 handles Uint8Array natively for proper digest calculation
+      let body: Uint8Array | undefined;
       if (req.method !== 'GET' && req.method !== 'HEAD') {
         const bodyData = await req.arrayBuffer();
         if (bodyData.byteLength > 0) {
-          body = Buffer.from(bodyData);
+          body = new Uint8Array(bodyData);
         }
       }
 
-      // smartregistry v2.0.0 handles JWT tokens natively - no decoding needed
-      // Pass rawBody for content-addressable operations (manifest push needs exact bytes for digest)
+      // smartregistry v2.2.0 handles JWT tokens natively and supports Uint8Array body
       const context = {
         method: req.method,
         path: url.pathname,