diff --git a/packages.config b/packages.config
index c7152727..2aaf855a 100644
--- a/packages.config
+++ b/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.4.1.9004" targetFramework="net45" />
-  <package id="bootstrap" version="3.4.1" targetFramework="net45" />
+  <package id="bootstrap" version="5.3.3" targetFramework="net45" />
   <package id="jQuery" version="3.5.0" targetFramework="net45" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net45" />