diff --git a/package.json b/package.json
index 3ceaacd91..5082a196f 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "season": "0.14.0",
     "semver": "1.1.4",
     "space-pen": "2.0.0",
-    "telepath": "0.31.0",
+    "telepath": "0.32.0",
     "temp": "0.5.0",
     "underscore-plus": "0.3.0"
   },
diff --git a/src/atom.coffee b/src/atom.coffee
index ea82b5705..7ae64877a 100644
--- a/src/atom.coffee
+++ b/src/atom.coffee
@@ -295,8 +295,7 @@ class Atom
 
     doc = Document.deserialize(documentState) if documentState?
     doc ?= Document.create()
-    doc.registerModelClass(require('./project'))
-    doc.registerModelClass(require('./text-buffer'))
+    doc.registerModelClasses(require('./project'), require('./text-buffer'))
     # TODO: Remove this when everything is using telepath models
     if @site?
       @site.setRootDocument(doc)