diff --git a/README.md b/README.md
index dc711787d0..4799481e40 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,17 @@ To run OpenSim from a command prompt
 
 # Running OpenSim on Linux/Mac
 
-You will need dotnet 6.0 runtime for linux or Mac (https://dotnet.microsoft.com/en-us/download/dotnet/6.0)
+You will need
 
+ * [dotnet 6.0 Runtime](https://dotnet.microsoft.com/en-us/download/dotnet/6.0)
+ * libgdiplus 
+ 
+ if you have mono 6.x complete, you already have libgdiplus, otherwise you need to install it
+ using a package manager for your operating system, like apt, brew, macports, etc
+ for example on debian:
+ 
+ `apt-get update && apt-get install -y apt-utils libgdiplus libc6-dev`
+ 
 To run OpenSim, from the unpacked distribution type:
 
  * cd bin
diff --git a/bin/CSJ2K.dll b/bin/CSJ2K.dll
index 88347fc3aa..896e874001 100755
Binary files a/bin/CSJ2K.dll and b/bin/CSJ2K.dll differ