diff --git a/README.md b/README.md
index fa60e90b528..111eff34225 100644
--- a/README.md
+++ b/README.md
@@ -315,7 +315,10 @@ See the [CHANGELOG](CHANGELOG.md) file for details.
 ### Lead Developers
 
 * **[Liyas Thomas](https://github.com/liyasthomas)** - *Author*
-* **[Caneco](https://twitter.com/caneco)** - *Designer*
+* **[John Harker](https://github.com/NBTX)** - *Lead developer*
+* **[Andrew Bastin](https://github.com/andrewbastin)** - *Lead developer*
+* **[James George](https://github.com/jamesgeorge007)** - *Lead maintainer*
+* **[Caneco](https://twitter.com/caneco)** - *Logo and banner designer*
 
 ### Testing and Debugging
 
diff --git a/functions/editorutils.js b/functions/editorutils.js
new file mode 100644
index 00000000000..c8e14a5f99f
--- /dev/null
+++ b/functions/editorutils.js
@@ -0,0 +1,11 @@
+const mimeToMode = {
+  "text/plain": "plain_text",
+  "text/html": "html",
+  "application/xml": "xml",
+  "application/hal+json": "json",
+  "application/json": "json"
+}
+
+export function getEditorLangForMimeType(mimeType) {
+  return mimeToMode[mimeType] || "plain_text";
+}
diff --git a/pages/index.vue b/pages/index.vue
index 85fd5938f66..c22b822a419 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -375,7 +375,7 @@
                   <label for="rawBody">{{ $t("raw_request_body") }}</label>
                   <Editor
                     v-model="rawParams"
-                    :lang="'json'"
+                    :lang="rawInputEditorLang"
                     :options="{
                       maxLines: '16',
                       minLines: '8',
@@ -1390,6 +1390,7 @@ import AceEditor from "../components/ace-editor";
 import { tokenRequest, oauthRedirect } from "../assets/js/oauth";
 import { sendNetworkRequest } from "../functions/network";
 import { fb } from "../functions/fb";
+import { getEditorLangForMimeType } from "~/functions/editorutils";
 
 const statusCategories = [
   {
@@ -1814,6 +1815,9 @@ export default {
         this.$store.commit("setState", { value, attribute: "rawInput" });
       }
     },
+    rawInputEditorLang() {
+      return getEditorLangForMimeType(this.contentType);
+    },
     requestType: {
       get() {
         return this.$store.state.request.requestType;