diff --git a/default/main.tf b/default/main.tf
index 4535f04..8e6054a 100644
--- a/default/main.tf
+++ b/default/main.tf
@@ -99,6 +99,7 @@ resource "coder_agent" "main" {
   arch                   = data.coder_provisioner.me.arch
   os                     = "linux"
   startup_script_timeout = 180
+  startup_script_behavior = "blocking"
   startup_script         = <<-EOT
     set -e
     # Base Script (to be downloaded)