diff --git a/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config b/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
index 9fba37a..751af3a 100644
--- a/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
+++ b/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
@@ -3,7 +3,7 @@
   <package id="Antlr" version="3.4.1.9004" targetFramework="net452" />
   <package id="AspNet.ScriptManager.bootstrap" version="3.0.0" targetFramework="net452" />
   <package id="AspNet.ScriptManager.jQuery" version="1.10.2" targetFramework="net452" />
-  <package id="bootstrap" version="3.0.0" targetFramework="net452" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net452" />
   <package id="EntityFramework" version="6.1.3" targetFramework="net452" />
   <package id="jQuery" version="1.10.2" targetFramework="net452" />
   <package id="Microsoft.AspNet.FriendlyUrls" version="1.0.2" targetFramework="net452" />