diff --git a/abra b/abra
index 8a7d313..38d3c0a 100755
--- a/abra
+++ b/abra
@@ -550,7 +550,7 @@ sub_server_ls() {
 ###### Subcommand `upgrade`
 
 sub_upgrade() {
-  curl -fsSL https://install.abra.autonomic.zone | bash
+  curl https://install.abra.autonomic.zone | bash
 }
 
 ###### Docker alias subcommands