diff --git a/itext/itext.bouncy-castle-adapter/itext.bouncy-castle-adapter.csproj b/itext/itext.bouncy-castle-adapter/itext.bouncy-castle-adapter.csproj
index e1ef51af7b..17591dd853 100644
--- a/itext/itext.bouncy-castle-adapter/itext.bouncy-castle-adapter.csproj
+++ b/itext/itext.bouncy-castle-adapter/itext.bouncy-castle-adapter.csproj
@@ -30,6 +30,6 @@
     <ProjectReference Include="..\itext.commons\itext.commons.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
+    <PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />
   </ItemGroup>
 </Project>
\ No newline at end of file