diff --git a/servant-js/src/Servant/JS/Vanilla.hs b/servant-js/src/Servant/JS/Vanilla.hs
index 22b29b4c..ea390e2f 100644
--- a/servant-js/src/Servant/JS/Vanilla.hs
+++ b/servant-js/src/Servant/JS/Vanilla.hs
@@ -37,10 +37,13 @@ generateVanillaJSWith opts req = "\n" <>
  <> (if isJust (req ^. reqBody) then "  xhr.setRequestHeader(\"Content-Type\",\"application/json\");\n" else "")
  <> "  xhr.onreadystatechange = function (e) {\n"
  <> "    if (xhr.readyState == 4) {\n"
+ <> "      if (xhr.status == 204 || xhr.status == 205) {\n"
+ <> "        onSuccess();\n"
+ <> "      } else if (xhr.status >= 200 && xhr.status < 300) {\n"
  <> "        var value = JSON.parse(xhr.responseText);\n"
- <> "      if (xhr.status == 200 || xhr.status == 201) {\n"
  <> "        onSuccess(value);\n"
  <> "      } else {\n"
+ <> "        var value = JSON.parse(xhr.responseText);\n"
  <> "        onError(value);\n"
  <> "      }\n"
  <> "    }\n"