diff --git a/Junahaku/packages.config b/Junahaku/packages.config
index 749947d..8cf44d2 100644
--- a/Junahaku/packages.config
+++ b/Junahaku/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="bootstrap" version="4.1.1" targetFramework="net471" />
+  <package id="bootstrap" version="4.3.1" targetFramework="net471" />
   <package id="jQuery" version="3.3.1" targetFramework="net471" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.8" targetFramework="net471" />
   <package id="Microsoft.Net.Compilers" version="2.6.1" targetFramework="net471" developmentDependency="true" />