diff --git a/pre-migration/source-code/AADB2C.UserMigration.API/packages.config b/pre-migration/source-code/AADB2C.UserMigration.API/packages.config
index caf136f..f11cfbe 100644
--- a/pre-migration/source-code/AADB2C.UserMigration.API/packages.config
+++ b/pre-migration/source-code/AADB2C.UserMigration.API/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.4.1.9004" targetFramework="net461" />
-  <package id="bootstrap" version="3.0.0" targetFramework="net461" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net461" />
   <package id="jQuery" version="1.10.2" targetFramework="net461" />
   <package id="Microsoft.ApplicationInsights" version="2.2.0" targetFramework="net461" />
   <package id="Microsoft.ApplicationInsights.Agent.Intercept" version="2.0.6" targetFramework="net461" />