diff --git a/STFU.Lib.MailSender/packages.config b/STFU.Lib.MailSender/packages.config
index 1d0c4ce..42a003a 100644
--- a/STFU.Lib.MailSender/packages.config
+++ b/STFU.Lib.MailSender/packages.config
@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="BouncyCastle" version="1.8.5" targetFramework="net461" />
+  <package id="BouncyCastle" version="1.8.9" targetFramework="net461" />
   <package id="log4net" version="2.0.12" targetFramework="net461" />
   <package id="MimeKit" version="2.3.1" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net461" />