diff --git a/src/Hermes/Hermes_Client.re b/src/Hermes/Hermes_Client.re
index 1afd4a6..ba9d657 100644
--- a/src/Hermes/Hermes_Client.re
+++ b/src/Hermes/Hermes_Client.re
@@ -5,6 +5,7 @@ let make = (~url, ~method) => {
     url,
     method,
     queryString: [],
+    responseType: Hermes_Types_ResponseType.TextResponse(None),
     onLoad: None,
     formData: [],
     headers: [],
diff --git a/src/Hermes/Hermes_ResponseType.re b/src/Hermes/Hermes_ResponseType.re
index 33147f2..b543a08 100644
--- a/src/Hermes/Hermes_ResponseType.re
+++ b/src/Hermes/Hermes_ResponseType.re
@@ -3,6 +3,7 @@ open Hermes_Types_Client;
 let setText = client => {
   {
     ...client,
+    responseType: Hermes_Types_ResponseType.TextResponse(None),
     onLoad: None,
   };
 };
@@ -10,6 +11,7 @@ let setText = client => {
 let setDocument = client => {
   {
     ...client,
+    responseType: Hermes_Types_ResponseType.DocumentResponse(None),
     onLoad: None,
   };
 };
@@ -17,6 +19,7 @@ let setDocument = client => {
 let setJson = client => {
   {
     ...client,
+    responseType: Hermes_Types_ResponseType.JSONResponse(None),
     onLoad: None,
   };
 };
@@ -24,6 +27,7 @@ let setJson = client => {
 let setArrayBuffer = client => {
   {
     ...client,
+    responseType: Hermes_Types_ResponseType.ArrayBufferResponse(None),
     onLoad: None,
   };
 };
\ No newline at end of file
diff --git a/src/Hermes/Types/Hermes_Types_Client.re b/src/Hermes/Types/Hermes_Types_Client.re
index 721b99a..823d62a 100644
--- a/src/Hermes/Types/Hermes_Types_Client.re
+++ b/src/Hermes/Types/Hermes_Types_Client.re
@@ -4,5 +4,6 @@ type t('a) = {
   queryString: list((string, string)),
   formData: list((string, string)),
   headers: list((string, string)),
+  responseType: 'a,
   onLoad: option(Hermes_Types_ResponseType.t('a) => unit),
 };
\ No newline at end of file