diff --git a/notebook/services/contents/handlers.py b/notebook/services/contents/handlers.py
index 2b9cacd1a..a063aec40 100644
--- a/notebook/services/contents/handlers.py
+++ b/notebook/services/contents/handlers.py
@@ -307,6 +307,17 @@ class NotebooksRedirectHandler(IPythonHandler):
     put = patch = post = delete = get
 
 
+class TrustNotebooksHandler(IPythonHandler):
+    """ Handles trust/signing of notebooks """
+
+    @json_errors
+    @web.authenticated
+    @gen.coroutine
+    def post(self,path=''):
+        cm = self.contents_manager
+        yield gen.maybe_future(cm.trust_notebook(path))
+        self.set_status(201)
+        self.finish()
 #-----------------------------------------------------------------------------
 # URL to handler mappings
 #-----------------------------------------------------------------------------
@@ -318,6 +329,7 @@ default_handlers = [
     (r"/api/contents%s/checkpoints" % path_regex, CheckpointsHandler),
     (r"/api/contents%s/checkpoints/%s" % (path_regex, _checkpoint_id_regex),
         ModifyCheckpointsHandler),
+    (r"/api/contents%s/trust" % path_regex, TrustNotebooksHandler),
     (r"/api/contents%s" % path_regex, ContentsHandler),
     (r"/api/notebooks/?(.*)", NotebooksRedirectHandler),
 ]
diff --git a/notebook/services/contents/manager.py b/notebook/services/contents/manager.py
index 09a00e911..19e697ede 100644
--- a/notebook/services/contents/manager.py
+++ b/notebook/services/contents/manager.py
@@ -426,7 +426,7 @@ class ContentsManager(LoggingConfigurable):
         nb = model['content']
         self.log.warning("Trusting notebook %s", path)
         self.notary.mark_cells(nb, True)
-        self.save(model, path)
+        self.check_and_sign(nb, path)
 
     def check_and_sign(self, nb, path=''):
         """Check for trusted cells, and sign the notebook.
@@ -443,7 +443,7 @@ class ContentsManager(LoggingConfigurable):
         if self.notary.check_cells(nb):
             self.notary.sign(nb)
         else:
-            self.log.warning("Saving untrusted notebook %s", path)
+            self.log.warning("Notebook %s is not trusted", path)
 
     def mark_trusted_cells(self, nb, path=''):
         """Mark cells as trusted if the notebook signature matches.
diff --git a/notebook/static/notebook/js/notebook.js b/notebook/static/notebook/js/notebook.js
index 6a3a2d966..468f120d8 100644
--- a/notebook/static/notebook/js/notebook.js
+++ b/notebook/static/notebook/js/notebook.js
@@ -2876,10 +2876,24 @@ define([
                                 cell.output_area.trusted = true;
                             }
                         }
-                        nb.events.on('notebook_saved.Notebook', function () {
-                            window.location.reload();
+                        // If its write only and dirty, save before 
+                        // trusting
+                        var pr;
+                        if(nb.writable && nb.dirty) {
+                            pr = nb.save_notebook();
+                        }
+                        else {
+                            pr = Promise.resolve();
+                        }
+                        return pr.then(function() {                            
+                            nb.contents.trust(nb.notebook_path)
+                            .then(function(res) {
+                                nb.events.trigger("trust_changed.Notebook", true);
+                                window.location.reload();
+                            }, function(err) {
+                                console.log(err);
+                            });
                         });
-                        nb.save_notebook();
                     }
                 }
             }
diff --git a/notebook/static/services/contents.js b/notebook/static/services/contents.js
index cffc9d236..867ddd470 100644
--- a/notebook/static/services/contents.js
+++ b/notebook/static/services/contents.js
@@ -161,6 +161,16 @@ define(function(require) {
         return utils.promising_ajax(url, settings);
     };
 
+    Contents.prototype.trust = function(path) {
+        var settings = {
+            processData : false,
+            type : "POST",
+            contentType: 'application/json',
+        };
+        var url = this.api_url(path, "trust");
+        return utils.promising_ajax(url, settings);
+    }
+
     Contents.prototype.save = function(path, model) {
         /**
          * We do the call with settings so we can set cache to false.