diff --git a/package-overrides/github/twbs/bootstrap@3.1.0.json b/package-overrides/github/twbs/bootstrap@3.1.0.json
index 570bd24..3b46557 100644
--- a/package-overrides/github/twbs/bootstrap@3.1.0.json
+++ b/package-overrides/github/twbs/bootstrap@3.1.0.json
@@ -1,11 +1,12 @@
 {
   "registry": "jspm",
   "dependencies": {
-    "jquery": "*"
+    "jquery": "*",
+    "css": "*"
   },
   "shim": {
     "js/bootstrap": {
-      "deps": ["jquery"],
+      "deps": ["jquery", "css"],
       "exports": "$"
     }
   }