diff --git a/ghost/admin/app/services/ajax.js b/ghost/admin/app/services/ajax.js
index 24bbed6fbc..788afae7c4 100644
--- a/ghost/admin/app/services/ajax.js
+++ b/ghost/admin/app/services/ajax.js
@@ -120,6 +120,7 @@ let ajaxService = AjaxService.extend({
         let headers = {};
 
         headers['X-Ghost-Version'] = config.APP.version;
+        headers['App-Pragma'] = 'no-cache';
 
         if (session.get('isAuthenticated')) {
             session.authorize('authorizer:oauth2', (headerName, headerValue) => {
diff --git a/ghost/admin/app/services/unsplash.js b/ghost/admin/app/services/unsplash.js
index 38339832a8..a5148326f9 100644
--- a/ghost/admin/app/services/unsplash.js
+++ b/ghost/admin/app/services/unsplash.js
@@ -175,7 +175,7 @@ export default Service.extend({
 
         headers.Authorization = `Client-ID ${this.get('applicationId')}`;
         headers['Accept-Version'] = API_VERSION;
-        headers['API-User-Agent'] = 'Ghost';
+        headers['App-Pragma'] = 'no-cache';
 
         return fetch(url, {headers})
             .then((response) => this._checkStatus(response))