diff --git a/Stack/Opc.Ua.Core/Opc.Ua.Core.csproj b/Stack/Opc.Ua.Core/Opc.Ua.Core.csproj
index 0090702fe4..aa8ec9d3b4 100644
--- a/Stack/Opc.Ua.Core/Opc.Ua.Core.csproj
+++ b/Stack/Opc.Ua.Core/Opc.Ua.Core.csproj
@@ -35,7 +35,7 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="Portable.BouncyCastle" Version="1.8.6.7" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.9.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net462'">