diff --git a/index.ts b/index.ts
index 64bf7046..13b5a889 100644
--- a/index.ts
+++ b/index.ts
@@ -46,6 +46,7 @@ class Client {
     const req = superagent.post(url.format(target)).send(data.body)
 
     delete data.body
+    delete data['content-length']
 
     Object.keys(data).forEach(key => {
       req.set(key, data[key])