diff --git a/Demos/WorkspaceManager/WorkspaceManager/packages.config b/Demos/WorkspaceManager/WorkspaceManager/packages.config
index 62bb3d5..06bf5bc 100644
--- a/Demos/WorkspaceManager/WorkspaceManager/packages.config
+++ b/Demos/WorkspaceManager/WorkspaceManager/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="bootstrap" version="4.1.1" targetFramework="net461" />
+  <package id="bootstrap" version="4.3.1" targetFramework="net461" />
   <package id="EntityFramework" version="6.2.0" targetFramework="net461" />
   <package id="jQuery" version="3.3.1" targetFramework="net461" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.6" targetFramework="net461" />