diff --git a/build/Build.bat b/build/Build.bat
index 61973a204..94f43b25c 100644
--- a/build/Build.bat
+++ b/build/Build.bat
@@ -1,6 +1,6 @@
 @ECHO OFF
 SET version=1.9.3.0
-SET webversion=3.2.7.0
+SET webversion=3.2.8.0
 SET webconfigversion=1.1.2.0
 
 ECHO Building ImageProcessor %version%, ImageProcess.Web %webversion% and ImageProcess.Web.Config %webconfigversion%
diff --git a/src/ImageProcessor.Web/NET45/Caching/DiskCache.cs b/src/ImageProcessor.Web/NET45/Caching/DiskCache.cs
index e48e57207..7d4150f45 100644
--- a/src/ImageProcessor.Web/NET45/Caching/DiskCache.cs
+++ b/src/ImageProcessor.Web/NET45/Caching/DiskCache.cs
@@ -14,9 +14,9 @@ namespace ImageProcessor.Web.Caching
     using System;
     using System.Collections.Generic;
     using System.Diagnostics.CodeAnalysis;
+    using System.Globalization;
     using System.IO;
     using System.Linq;
-    using System.Security.Cryptography;
     using System.Threading.Tasks;
     using System.Web;
     using System.Web.Hosting;
@@ -286,14 +286,11 @@ namespace ImageProcessor.Web.Caching
                         {
                             // Pull the latest info.
                             imageFileInfo.Refresh();
-                            using (MD5 md5 = MD5.Create())
-                            {
-                                using (FileStream stream = File.OpenRead(imageFileInfo.FullName))
-                                {
-                                    byte[] hash = md5.ComputeHash(stream);
-                                    streamHash = BitConverter.ToString(hash);
-                                }
-                            }
+
+                            // Checking the stream itself is far too processor intensive so we make a best guess.
+                            string creation = imageFileInfo.CreationTimeUtc.ToString(CultureInfo.InvariantCulture);
+                            string length = imageFileInfo.Length.ToString(CultureInfo.InvariantCulture);
+                            streamHash = string.Format("{0}{1}", creation, length);
                         }
                     }
                 }
diff --git a/src/ImageProcessor.Web/NET45/Properties/AssemblyInfo.cs b/src/ImageProcessor.Web/NET45/Properties/AssemblyInfo.cs
index 8763d6242..e8c655990 100644
--- a/src/ImageProcessor.Web/NET45/Properties/AssemblyInfo.cs
+++ b/src/ImageProcessor.Web/NET45/Properties/AssemblyInfo.cs
@@ -35,5 +35,5 @@ using ImageProcessor.Web.HttpModules;
 //
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("3.2.7.0")]
-[assembly: AssemblyFileVersion("3.2.7.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("3.2.8.0")]
+[assembly: AssemblyFileVersion("3.2.8.0")]
\ No newline at end of file