diff --git a/bookworm b/bookworm
index 4dc956d..dbff98a 100755
--- a/bookworm
+++ b/bookworm
@@ -234,9 +234,9 @@ function apt_install() {
 
 function check_assertions()
 {
-    if [[ $DISTRIB != "unstable" ]]
+    if [[ $DISTRIB == "stable" ]]
     then
-        error "Only unstable branch is supported for Bookworm right now. We ABSOLUTELY DISCOURAGE using YunoHost Bookworm in any sort of production (or even testing) setup right now. Everything is in PRE-ALPHA STAGE ONLY."
+        error "Only unstable and testing branches are supported for Bookworm right now. We ABSOLUTELY DISCOURAGE using YunoHost Bookworm in any sort of production setup right now. Everything is in BETA STAGE ONLY."
         return 1
     fi