diff --git a/manifest.toml b/manifest.toml
index b67d508..de2e165 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -21,7 +21,7 @@ yunohost = ">= 11.2"
 architectures = ["armhf", "arm64", "amd64", "i386"]
 multi_instance = true
 ldap = false
-sso = not_relevant
+sso = "not_relevant"
 disk = "50M" # FIXME: replace with an **estimate** minimum disk requirement. e.g. 20M, 400M, 1G, ...
 ram.build = "50M" # FIXME: replace with an **estimate** minimum ram requirement. e.g. 50M, 400M, 1G, ...
 ram.runtime = "50M" # FIXME: replace with an **estimate** minimum ram requirement. e.g. 50M, 400M, 1G, ...