diff --git a/SignalR_Demo/Notifications_SignalR/Notifications_SignalR/packages.config b/SignalR_Demo/Notifications_SignalR/Notifications_SignalR/packages.config
index 82797ff..48687a7 100644
--- a/SignalR_Demo/Notifications_SignalR/Notifications_SignalR/packages.config
+++ b/SignalR_Demo/Notifications_SignalR/Notifications_SignalR/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="bootstrap" version="3.0.0" targetFramework="net461" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net461" />
   <package id="jQuery" version="3.4.1" targetFramework="net461" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.7" targetFramework="net461" />
   <package id="Microsoft.AspNet.Razor" version="3.2.7" targetFramework="net461" />