diff --git a/package.json b/package.json
index 311b49c..c6f39ab 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
         "@angular/router": "^4.0.0",
         "angular-snap": "^1.8.5",
         "bootstrap": "^4.0.0-alpha.6",
+        "bootstrap-sass": "^3.3.7",
         "core-js": "^2.4.1",
         "font-awesome": "^4.7.0",
         "ngx-bootstrap": "^1.8.0",