diff --git a/SabreTools.Serialization/Wrappers/PortableExecutable.Extraction.cs b/SabreTools.Serialization/Wrappers/PortableExecutable.Extraction.cs
index a455ee4a..dc5e8d0c 100644
--- a/SabreTools.Serialization/Wrappers/PortableExecutable.Extraction.cs
+++ b/SabreTools.Serialization/Wrappers/PortableExecutable.Extraction.cs
@@ -176,7 +176,7 @@ public bool ExtractInstallShieldExecutable(string outputDirectory, bool includeD
                 if (overlayAddress < 0)
                     return false;
 
-                const int chunkSize = 64 * 1024;
+                const int chunkSize = 2048 * 1024;
                 var reader = new Readers.InstallShieldExecutableFile();
 
                 lock (_dataSourceLock)