diff --git a/prebuild.xml b/prebuild.xml
index 798d22d..c6a69d6 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1,4 +1,4 @@
-<Project frameworkVersion="v4_0" name="OpenSim.Modules.Warp3DCachedImageModule" path="addon-modules/OpenSim.Modules.Warp3DCachedImageModule/src" type="Library">
+<Project frameworkVersion="v4_6" name="OpenSim.Modules.Warp3DCachedImageModule" path="addon-modules/OpenSim.Modules.Warp3DCachedImageModule/src" type="Library">
 	<Configuration name="Debug">
         <Options>
           <OutputPath>../../../bin</OutputPath>