diff --git a/Src/SmtpServer.Tests/packages.config b/Src/SmtpServer.Tests/packages.config
index 9c03379..04a11bb 100644
--- a/Src/SmtpServer.Tests/packages.config
+++ b/Src/SmtpServer.Tests/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="1.8.2" targetFramework="net461" />
+  <package id="BouncyCastle" version="1.8.9" targetFramework="net461" />
   <package id="MailKit" version="2.1.1" targetFramework="net461" />
   <package id="MimeKit" version="2.1.1" targetFramework="net461" />
   <package id="xunit" version="2.4.1" targetFramework="net461" />