diff --git a/packages/bruno-app/src/components/CollectionSettings/Headers/index.js b/packages/bruno-app/src/components/CollectionSettings/Headers/index.js
index 718a38bd5..9ae6e1e07 100644
--- a/packages/bruno-app/src/components/CollectionSettings/Headers/index.js
+++ b/packages/bruno-app/src/components/CollectionSettings/Headers/index.js
@@ -13,6 +13,7 @@ import { saveCollectionRoot } from 'providers/ReduxStore/slices/collections/acti
 import SingleLineEditor from 'components/SingleLineEditor';
 import StyledWrapper from './StyledWrapper';
 import { headers as StandardHTTPHeaders } from 'know-your-http-well';
+import { MimeTypes } from 'utils/codemirror/autocompleteConstants';
 const headerAutoCompleteList = StandardHTTPHeaders.map((e) => e.header);
 
 const Headers = ({ collection }) => {
@@ -117,6 +118,7 @@ const Headers = ({ collection }) => {
                           )
                         }
                         collection={collection}
+                        autocomplete={MimeTypes}
                       />
                     </td>
                     <td>
diff --git a/packages/bruno-app/src/components/RequestPane/RequestHeaders/index.js b/packages/bruno-app/src/components/RequestPane/RequestHeaders/index.js
index 445505c07..94a8a53f5 100644
--- a/packages/bruno-app/src/components/RequestPane/RequestHeaders/index.js
+++ b/packages/bruno-app/src/components/RequestPane/RequestHeaders/index.js
@@ -9,6 +9,7 @@ import { sendRequest, saveRequest } from 'providers/ReduxStore/slices/collection
 import SingleLineEditor from 'components/SingleLineEditor';
 import StyledWrapper from './StyledWrapper';
 import { headers as StandardHTTPHeaders } from 'know-your-http-well';
+import { MimeTypes } from 'utils/codemirror/autocompleteConstants';
 const headerAutoCompleteList = StandardHTTPHeaders.map((e) => e.header);
 
 const RequestHeaders = ({ item, collection }) => {
@@ -115,6 +116,7 @@ const RequestHeaders = ({ item, collection }) => {
                           )
                         }
                         onRun={handleRun}
+                        autocomplete={MimeTypes}
                         allowNewlines={true}
                         collection={collection}
                       />
diff --git a/packages/bruno-app/src/utils/codemirror/autocompleteConstants.js b/packages/bruno-app/src/utils/codemirror/autocompleteConstants.js
new file mode 100644
index 000000000..f0c8a9aa2
--- /dev/null
+++ b/packages/bruno-app/src/utils/codemirror/autocompleteConstants.js
@@ -0,0 +1,56 @@
+export const MimeTypes = [
+  'application/atom+xml',
+  'application/ecmascript',
+  'application/json',
+  'application/vnd.api+json',
+  'application/javascript',
+  'application/octet-stream',
+  'application/ogg',
+  'application/pdf',
+  'application/postscript',
+  'application/rdf+xml',
+  'application/rss+xml',
+  'application/soap+xml',
+  'application/font-woff',
+  'application/x-yaml',
+  'application/xhtml+xml',
+  'application/xml',
+  'application/xml-dtd',
+  'application/xop+xml',
+  'application/zip',
+  'application/gzip',
+  'application/graphql',
+  'application/x-www-form-urlencoded',
+  'audio/basic',
+  'audio/L24',
+  'audio/mp4',
+  'audio/mpeg',
+  'audio/ogg',
+  'audio/vorbis',
+  'audio/vnd.rn-realaudio',
+  'audio/vnd.wave',
+  'audio/webm',
+  'image/gif',
+  'image/jpeg',
+  'image/pjpeg',
+  'image/png',
+  'image/svg+xml',
+  'image/tiff',
+  'message/http',
+  'message/imdn+xml',
+  'message/partial',
+  'message/rfc822',
+  'multipart/mixed',
+  'multipart/alternative',
+  'multipart/related',
+  'multipart/form-data',
+  'multipart/signed',
+  'multipart/encrypted',
+  'text/cmd',
+  'text/css',
+  'text/csv',
+  'text/html',
+  'text/plain',
+  'text/vcard',
+  'text/xml'
+];