decode seems to work now

dist/bert.js

@@ -95,7 +95,7 @@ export class Bert {
         if (buffer[0] !== Types.BERT_START) {
             throw new Error("Not a valid BERT");
         }
-        const obj = this.#decode(Buffer.from(buffer, 1));
+        const obj = this.#decode(buffer.subarray(1));
         if (obj.rest.length !== 0) {
             throw new Error("Invalid BERT");
         }

src/bert.ts

@@ -115,7 +115,7 @@ export class Bert {
             throw new Error("Not a valid BERT");
         }
 
-        const obj = this.#decode(Buffer.from(buffer, 1));
+        const obj = this.#decode(buffer.subarray(1));
 
         if (obj.rest.length !== 0) {
             throw new Error("Invalid BERT");