diff --git a/itext/itext.publications/itext.publications.signatures/itext.publications.signatures.csproj b/itext/itext.publications/itext.publications.signatures/itext.publications.signatures.csproj
index 3cef7cb3..0a82541c 100644
--- a/itext/itext.publications/itext.publications.signatures/itext.publications.signatures.csproj
+++ b/itext/itext.publications/itext.publications.signatures/itext.publications.signatures.csproj
@@ -24,7 +24,7 @@
     <ItemGroup>
         <PackageReference Include="NUnit" Version="3.7.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="3.8.0" />
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />
     </ItemGroup>
     <ItemGroup>
         <PackageReference Include="itext.licensing.base" Version="4.1.5-SNAPSHOT" Condition="!Exists('..\..\..\..\licensekey\itext\itext.licensing.base\itext.licensing.base.csproj')" />