diff --git a/Chapter.05/DataParallelism.Part2.fs/packages.config b/Chapter.05/DataParallelism.Part2.fs/packages.config
index 91433d92..13a6f064 100644
--- a/Chapter.05/DataParallelism.Part2.fs/packages.config
+++ b/Chapter.05/DataParallelism.Part2.fs/packages.config
@@ -53,7 +53,7 @@
   <package id="System.Security.Cryptography.Encoding" version="4.0.0" targetFramework="net47" />
   <package id="System.Security.Cryptography.Primitives" version="4.0.0" targetFramework="net47" />
   <package id="System.Security.Cryptography.ProtectedData" version="4.0.0" targetFramework="net47" />
-  <package id="System.Security.Cryptography.X509Certificates" version="4.1.0" targetFramework="net47" />
+  <package id="System.Security.Cryptography.X509Certificates" version="4.1.2" targetFramework="net47" />
   <package id="System.Text.Encoding" version="4.0.11" targetFramework="net47" />
   <package id="System.Text.Encoding.Extensions" version="4.0.11" targetFramework="net47" />
   <package id="System.Text.RegularExpressions" version="4.1.0" targetFramework="net47" />