diff --git a/flex-microform-sample/packages.config b/flex-microform-sample/packages.config
index 7c7ae83..afe91bc 100644
--- a/flex-microform-sample/packages.config
+++ b/flex-microform-sample/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.5.0.2" targetFramework="net461" />
-  <package id="bootstrap" version="3.3.7" targetFramework="net461" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net461" />
   <package id="CyberSource.Authentication" version="0.0.0.7" targetFramework="net461" />
   <package id="CyberSource.Rest.Client" version="0.0.1.3" targetFramework="net461" />
   <package id="jose-jwt" version="2.4.0" targetFramework="net461" />