diff --git a/bower.json b/bower.json
index f8df168..478a87e 100644
--- a/bower.json
+++ b/bower.json
@@ -13,7 +13,7 @@
     "bower_components"
   ],
   "dependencies": {
-    "bootstrap": "~3.3.1",
-    "ace-builds": "~1.1.8"
+    "bootstrap": "< 4",
+    "ace-builds": "< 2"
   }
 }