diff --git a/package.json b/package.json
index f565106..c0f75e7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sliver-script",
-  "version": "1.0.14",
+  "version": "1.0.15",
   "description": "TypeScript/JavaScript Sliver client library",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/client.ts b/src/client.ts
index 80dbef2..b130a67 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -186,17 +186,13 @@ export class InteractiveSession {
     }); 
   }
 
-  upload(path: string, encoder: string, data: Buffer, timeout = TIMEOUT): Promise<sliverpb.Upload> {
+  upload(path: string, data: Buffer, timeout = TIMEOUT): Promise<sliverpb.Upload> {
     return new Promise(async (resolve, reject) => {
       const req = new sliverpb.UploadReq();
       req.setPath(path);
-      req.setEncoder(encoder);
+      req.setEncoder('gzip');
       let payload = data;
-      if (encoder === 'gzip') {
-        payload = await gzip(data)
-      } else if (encoder !== '') {
-        return reject(`Unsupported encoder ${encoder}`)
-      }
+      payload = await gzip(data)
       req.setData(payload);
       req.setRequest(this.request(timeout));
       this._rpc.upload(req, this.deadline(timeout), (err, upload) => {