diff --git a/json_rpc/clients/httpclient.nim b/json_rpc/clients/httpclient.nim
index 9986523..58adae9 100644
--- a/json_rpc/clients/httpclient.nim
+++ b/json_rpc/clients/httpclient.nim
@@ -52,7 +52,8 @@ method call*(client: RpcHttpClient, name: string,
     reqBody = $rpcCallNode(name, params, id)
     req = HttpClientRequestRef.post(client.httpSession,
                                     client.httpAddress.get,
-                                    body = reqBody.toOpenArrayByte(0, reqBody.len - 1))
+                                    body = reqBody.toOpenArrayByte(0, reqBody.len - 1),
+                                    headers = [("Content-Type", "application/json")])
     res =
       try:
         await req.send()