diff --git a/EnvelopeGenerator.PdfEditor/Pdf.cs b/EnvelopeGenerator.PdfEditor/Pdf.cs
index e539338c..637d777e 100644
--- a/EnvelopeGenerator.PdfEditor/Pdf.cs
+++ b/EnvelopeGenerator.PdfEditor/Pdf.cs
@@ -20,7 +20,7 @@ namespace EnvelopeGenerator.PdfEditor
 
         public static Pdf<MemoryStream, MemoryStream> FromMemory(MemoryStream stream)
         {
-            return new Pdf<MemoryStream, MemoryStream>(stream, new MemoryStream());
+            return new Pdf<MemoryStream, MemoryStream>(stream, new MemoryStream(), disposeInputStream: false);
         }
     }
 
@@ -34,13 +34,16 @@ namespace EnvelopeGenerator.PdfEditor
         private readonly PdfReader _reader;
         private readonly PdfWriter _writer;
 
-        public Pdf(TInputStream inputStream, TOutputStream outputStream)
+        private readonly bool _disposeInputStream;
+
+        public Pdf(TInputStream inputStream, TOutputStream outputStream, bool disposeInputStream = true)
         {
             _inputStream = inputStream;
             _outputStream = outputStream;
             _reader = new PdfReader(inputStream);
             _writer = new PdfWriter(outputStream);
             _doc = new PdfDocument(_reader, _writer);
+            _disposeInputStream = disposeInputStream;
         }
 
         /// <summary>
@@ -152,7 +155,7 @@ namespace EnvelopeGenerator.PdfEditor
             {
                 // Managed resources
                 _doc?.Close();
-                _inputStream?.Dispose();
+                if (_disposeInputStream) _inputStream?.Dispose();
                 _outputStream?.Dispose();
             }
             else
@@ -160,7 +163,7 @@ namespace EnvelopeGenerator.PdfEditor
                 // When called by the finalizer, clean up only unmanaged resources
                 // Unmanaged resources such as PdfDocument, PdfReader, and PdfWriter are already IDisposable; we close them here
                 try { _doc?.Close(); } catch { }
-                try { _inputStream?.Dispose(); } catch { }
+                try { if(_disposeInputStream) _inputStream?.Dispose(); } catch { }
                 try { _outputStream?.Dispose(); } catch { }
             }
 
@@ -173,10 +176,13 @@ namespace EnvelopeGenerator.PdfEditor
                 return;
 
             _doc?.Close();
-            if (_inputStream is IAsyncDisposable asyncInput)
-                await asyncInput.DisposeAsync();
-            else
-                _inputStream.Dispose();
+            if (_disposeInputStream)
+            {
+                if (_inputStream is IAsyncDisposable asyncInput)
+                    await asyncInput.DisposeAsync();
+                else
+                    _inputStream.Dispose();
+            }
 
             if (_outputStream is IAsyncDisposable asyncOutput)
                 await asyncOutput.DisposeAsync();