diff --git a/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj b/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
index 660d2d4..2a64041 100644
--- a/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
+++ b/src/iTextSharp.LGPLv2.Core/iTextSharp.LGPLv2.Core.csproj
@@ -36,7 +36,7 @@
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
     <PackageReference Include="CoreCompat.System.Drawing" Version="1.0.0-beta006" />
-    <PackageReference Include="Portable.BouncyCastle" Version="1.8.5" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.8.10" />
     <PackageReference Include="System.Collections.NonGeneric" Version="4.3.0" />
     <PackageReference Include="System.Net.Requests" Version="4.3.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
@@ -51,7 +51,7 @@
   </PropertyGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="System.Drawing.Common" Version="5.0.1" />
-    <PackageReference Include="Portable.BouncyCastle" Version="1.8.9" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.8.10" />
     <PackageReference Include="System.Collections.NonGeneric" Version="4.3.0" />
     <PackageReference Include="System.Net.Requests" Version="4.3.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
@@ -65,7 +65,7 @@
     <DefineConstants>NETSTANDARD2_0</DefineConstants>
   </PropertyGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'net40' ">
-    <PackageReference Include="Portable.BouncyCastle" Version="1.8.9" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.8.10" />
   </ItemGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net40'">
     <DefineConstants>NET40</DefineConstants>