diff --git a/EnvelopeGenerator.PdfEditor/Pdf.cs b/EnvelopeGenerator.PdfEditor/Pdf.cs
index 8b1d39ac..325c2775 100644
--- a/EnvelopeGenerator.PdfEditor/Pdf.cs
+++ b/EnvelopeGenerator.PdfEditor/Pdf.cs
@@ -24,7 +24,7 @@ namespace EnvelopeGenerator.PdfEditor
 #endif
             outputStream = null)
         {
-            return new Pdf<MemoryStream, MemoryStream>(stream, outputStream ?? new MemoryStream(), disposeInputStream: false);
+            return new Pdf<MemoryStream, MemoryStream>(stream, outputStream ?? new MemoryStream(), disposeInputStream: false, disposeOutputStream: outputStream is null);
         }
     }
 
@@ -39,8 +39,9 @@ namespace EnvelopeGenerator.PdfEditor
         private readonly PdfWriter _writer;
 
         private readonly bool _disposeInputStream;
+        private readonly bool _disposeOutputStream;
 
-        public Pdf(TInputStream inputStream, TOutputStream outputStream, bool disposeInputStream = true)
+        public Pdf(TInputStream inputStream, TOutputStream outputStream, bool disposeInputStream = true, bool disposeOutputStream = true)
         {
             _inputStream = inputStream;
             _outputStream = outputStream;
@@ -48,6 +49,7 @@ namespace EnvelopeGenerator.PdfEditor
             _writer = new PdfWriter(outputStream);
             _doc = new PdfDocument(_reader, _writer);
             _disposeInputStream = disposeInputStream;
+            _disposeOutputStream = disposeOutputStream;
         }
 
         /// <summary>
@@ -160,7 +162,7 @@ namespace EnvelopeGenerator.PdfEditor
                 // Managed resources
                 _doc?.Close();
                 if (_disposeInputStream) _inputStream?.Dispose();
-                _outputStream?.Dispose();
+                if(_disposeOutputStream) _outputStream?.Dispose();
             }
             else
             {
@@ -168,7 +170,7 @@ namespace EnvelopeGenerator.PdfEditor
                 // Unmanaged resources such as PdfDocument, PdfReader, and PdfWriter are already IDisposable; we close them here
                 try { _doc?.Close(); } catch { }
                 try { if(_disposeInputStream) _inputStream?.Dispose(); } catch { }
-                try { _outputStream?.Dispose(); } catch { }
+                try { if (_disposeOutputStream) _outputStream?.Dispose(); } catch { }
             }
 
             _disposed = true;
@@ -188,10 +190,13 @@ namespace EnvelopeGenerator.PdfEditor
                     _inputStream.Dispose();
             }
 
-            if (_outputStream is IAsyncDisposable asyncOutput)
-                await asyncOutput.DisposeAsync();
-            else
-                _outputStream?.Dispose();
+            if (_disposeOutputStream)
+            {
+                if (_outputStream is IAsyncDisposable asyncOutput)
+                    await asyncOutput.DisposeAsync();
+                else
+                    _outputStream?.Dispose();
+            }
 
             _disposed = true;
             GC.SuppressFinalize(this);