diff --git a/templates/310_package-ngcp.yaml.tt2 b/templates/310_package-ngcp.yaml.tt2
index a247f88..ef427fd 100644
--- a/templates/310_package-ngcp.yaml.tt2
+++ b/templates/310_package-ngcp.yaml.tt2
@@ -88,4 +88,5 @@ package:
   prosody:
     installed: true
     versions:
-    - 0.9.12-2+deb9u2+bpo10+1
+      not:
+        - "0.9.12-2+deb9u2+bpo10+1"