diff --git a/pack.sh b/pack.sh
index 0045e88..95cc2f6 100644
--- a/pack.sh
+++ b/pack.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/bash
 set -ex
 rm -rf nuget
-dotnet pack -o ./nuget/
+dotnet pack -c Release -o ./nuget/
 rm ./nuget/DTLib.Tests.*
 ls nuget