diff --git a/src/Epub/Epub.csproj b/src/Epub/Epub.csproj
index 783b0fd..2fb52db 100644
--- a/src/Epub/Epub.csproj
+++ b/src/Epub/Epub.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Devlooped.Web" Version="1.2.0" />
-    <PackageReference Include="ISBN" Version="1.4.0" />
+    <PackageReference Include="ISBN" Version="1.4.2" />
     <PackageReference Include="NuGetizer" Version="1.2.1" />
     <PackageReference Include="PolySharp" Version="1.14.1" PrivateAssets="all" />
     <PackageReference Include="ThisAssembly.Strings" Version="1.4.3" PrivateAssets="all" />