diff --git a/build.net.sh b/build.net.sh
index 99ed31d..ebbca89 100755
--- a/build.net.sh
+++ b/build.net.sh
@@ -3,7 +3,7 @@
 # Usage ... ./build.net.sh [dotnet_version]
 #
 
-DOTNETVER=8.0
+DOTNETVER=9.0
 
 CONFIGPATH=./config
 OPNSIMPATH=../bin