diff --git a/src/Docfx.App/PdfBuilder.cs b/src/Docfx.App/PdfBuilder.cs
index f1870a986f9..a4b0992b2f0 100644
--- a/src/Docfx.App/PdfBuilder.cs
+++ b/src/Docfx.App/PdfBuilder.cs
@@ -270,7 +270,7 @@ await Parallel.ForEachAsync(pages, async (item, _) =>
         if (numberOfPages is 0)
             return;
 
-        var producer = $"docfx ({typeof(PdfBuilder).Assembly.GetCustomAttribute<AssemblyVersionAttribute>()?.Version})";
+        var producer = $"docfx ({typeof(PdfBuilder).Assembly.GetCustomAttribute<AssemblyFileVersionAttribute>()?.Version})";
 
         using var output = File.Create(outputPath);
         using var builder = new PdfDocumentBuilder(output);